{"title":"Pentair RO Replacement Filters \u0026 Membranes","description":"\u003cp\u003eReplacement filter sets and membranes for Pentair and Franklin Electric \/ Pentair Green RO under-sink reverse osmosis systems.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePentair GRO-2550 (4-stage, 50 GPD):\u003c\/strong\u003e \u003ca href=\"\/products\/ipw-industries-inc-compatible-to-pentair%E2%84%A2-gro-2550-50-gpd-4-stage-ro-replacement-water-filters-includes-4002574-50-gpd-sediment-carbon-block-inline-with-3-8-quick-connect\"\u003ecomplete filter set with 4002574 membrane\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePentair Green RO GRO-50-5 (5-stage, 50 GPD):\u003c\/strong\u003e \u003ca href=\"\/products\/ipw-industries-inc-compatible-to-franklin-electric-pentair-green-ro-gro-50-5-5-stage-50-gpd-replacement-water-filter-set-sediment-2-carbon-block-inline-post-carbon-optional-1-1-high-recovery-membrane\"\u003efilter set with optional 1:1 high-recovery membrane\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMembranes:\u003c\/strong\u003e Pentair GRO encapsulated membrane with check valve (1:1 ratio) and Pentair TLC membrane element\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eReplace pre-filters every 6–12 months and the membrane every 2–3 years. Not sure which set fits? Call (714) 541-6600 with your model number.\u003c\/p\u003e\u003c!--ipwsys--\u003e\u003cp\u003e\u003cstrong\u003eStage-by-stage fit guides:\u003c\/strong\u003e \u003ca href=\"\/pages\/replacement-filters-franklin-pentair-gro-50-5\"\u003eFranklin Electric \/ Pentair Green RO GRO-50-5 (5-stage, 50 GPD)\u003c\/a\u003e · \u003ca href=\"\/pages\/replacement-filters-pentair-gro-2550\"\u003eFranklin Electric \/ Pentair GRO-2550 (4-stage, 50 GPD)\u003c\/a\u003e · \u003ca href=\"\/pages\/replacement-filters-pentek-ro-2550\"\u003ePentek RO-2550 (161079)\u003c\/a\u003e. See \u003ca href=\"\/pages\/replacement-filters-by-system\"\u003eall 154 systems\u003c\/a\u003e.\u003c\/p\u003e\u003c!--\/ipwsys--\u003e","products":[{"product_id":"pentair-gro-encapsulated-replacement-reverse-osmosis-membrane-with-check-valve-1-1-ratiop","title":"Pentair GRO Encapsulated Replacement Reverse Osmosis Membrane with Check Valve - 1:1 Ratio","description":"\n\u003clink href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Serif+Display:ital@0;1\u0026amp;family=DM+Sans:wght@300;400;500;600\u0026amp;display=swap\" rel=\"stylesheet\"\u003e\n\u003cstyle\u003e\n  .ro-wrap {\n    --deep:#0a1628;--ocean:#0f3460;--blue:#1565c0;--sky:#2196f3;--aqua:#4dd0e1;\n    --white:#ffffff;--offwhite:#f2f7fc;--slate:#dce8f5;--text:#0d1f38;--muted:#4a6280;\n    --gold:#f59e0b;--radius:12px;\n    font-family:'DM Sans',sans-serif;color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-wrap:break-word;word-break:break-word;min-width:0;\n  }\n  .ro-wrap 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!important;font-weight:600;color:var(--deep);margin-bottom:4px;}\n  .ro-wrap .spec-card .sc-note{font-size:15px !important;color:var(--muted);}\n  @media(max-width:640px){\n    .ro-wrap .ro-hero{padding:36px 24px 32px;}\n    .ro-wrap .ro-section{padding:28px 20px;}\n    .ro-wrap .ro-feature-grid,.ro-wrap .faucet-grid,.ro-wrap .filter-schedule,.ro-wrap .spec-cards{grid-template-columns:1fr;}\n    .ro-wrap .benefits-strip{flex-direction:column;}\n    .ro-wrap .benefit-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.1);}\n  }\n  \/* ── Nuclear override — force all text inside ro-wrap to be readable ── *\/\n  .ro-wrap p,\n  .ro-wrap li,\n  .ro-wrap td,\n  .ro-wrap th,\n  .ro-wrap .ro-section \u003e p {\n    font-size: 18px !important;\n    line-height: 1.6 !important;\n  }\n  .ro-wrap .ro-section \u003e p,\n  .ro-wrap .ro-callout p,\n  .ro-wrap .stage-body p,\n  .ro-wrap .ro-feature-card p,\n  .ro-wrap .schedule-card p,\n  .ro-wrap .faucet-card p,\n  .ro-wrap .spec-card .sc-note,\n  .ro-wrap .pro-tip p {\n    font-size: 18px !important;\n    line-height: 1.6 !important;\n  }\n  .ro-wrap h2 { font-size: clamp(26px,4vw,40px) !important; line-height:1.15 !important; }\n  .ro-wrap h3 { font-size: 20px !important; line-height:1.3 !important; }\n  .ro-wrap h4 { font-size: 18px !important; line-height:1.3 !important; }\n  .ro-wrap .ro-label,\n  .ro-wrap .stage-tag,\n  .ro-wrap .sc-label { font-size: 14px !important; }\n  .ro-wrap .ro-title { font-size: 24px !important; }\n  .ro-wrap .interval { font-size: 22px !important; }\n  .ro-wrap .stage-num { font-size: 16px !important; }\n  .ro-wrap .ro-eyebrow { font-size: 14px !important; }\n  .ro-wrap .ro-badge { font-size: 15px !important; }\n\u003c\/style\u003e\n\u003cdiv class=\"ro-wrap\"\u003e\n\n\u003cdiv class=\"ro-hero\"\u003e\n\u003cdiv class=\"ro-eyebrow\"\u003ePentair GRO Series\u003c\/div\u003e\n\u003ch2\u003eEncapsulated Replacement Reverse Osmosis Membrane with Check Valve – \u003cem\u003e1:1 Ratio\u003c\/em\u003e\n\u003c\/h2\u003e\n\u003cp class=\"ro-tagline\"\u003eHigh-efficiency TLC membrane with integrated housing and check valve, delivering near 1:1 waste-to-pure water ratio for residential reverse osmosis systems\u003c\/p\u003e\n\u003cdiv class=\"ro-badges\"\u003e\n\u003cspan class=\"ro-badge\"\u003eTLC Membrane Technology\u003c\/span\u003e\n\u003cspan class=\"ro-badge\"\u003eQuick Connect Fittings\u003c\/span\u003e\n\u003cspan class=\"ro-badge\"\u003e2-5 Year Lifespan\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eWHY IT WORKS\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003ePentair's TLC thin layer composite technology in a pre-fitted encapsulated housing\u003c\/h3\u003e\n\u003cdiv class=\"ro-feature-grid\"\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003cdiv class=\"ro-feat-icon\"\u003e\u003cspan\u003e💧\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003eNear 1:1 Water Efficiency\u003c\/h3\u003e\n\u003cp\u003eUnlike traditional 4:1 ratio membranes, this GRO membrane wastes approximately one gallon for every gallon produced, reducing drain water by up to 75%\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003cdiv class=\"ro-feat-icon\"\u003e\u003cspan\u003e🔧\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003eEncapsulated Design\u003c\/h3\u003e\n\u003cp\u003ePre-installed in housing with quick connect fittings and integrated check valve. Drop-in replacement eliminates membrane wrapping and housing reassembly\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003cdiv class=\"ro-feat-icon\"\u003e\u003cspan\u003e🎯\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003eTLC Membrane Technology\u003c\/h3\u003e\n\u003cp\u003ePentair's thin layer composite membrane handles broad water chemistry ranges while maintaining consistent rejection rates across 2-5 year service life\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003cdiv class=\"ro-feat-icon\"\u003e\u003cspan\u003e⚙️\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003eWide Operating Range\u003c\/h3\u003e\n\u003cp\u003eFunctions reliably from 40-145 psi and 40-100°F, accommodating most municipal and well water pressure without booster pump requirements\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eCOMPATIBILITY\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eFits most conventional residential reverse osmosis systems\u003c\/h3\u003e\n\u003cp\u003eThis 2.5\" x 16\" encapsulated membrane replaces standard membrane housings in residential RO systems from Pentair, GE, Whirlpool, and other manufacturers using quick connect fittings. Verify your system uses a standard 2.5\" diameter membrane housing before ordering. The integrated check valve prevents backflow, eliminating the need for separate valve installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eMAINTENANCE\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eReplacement schedule for optimal performance\u003c\/h3\u003e\n\u003cdiv class=\"filter-schedule\"\u003e\n\u003cdiv class=\"schedule-card\"\u003e\n\u003cdiv class=\"interval\"\u003eEvery 2-5 Years\u003c\/div\u003e\n\u003ch4\u003eRO Membrane Replacement\u003c\/h4\u003e\n\u003cp\u003eReplace when production rate drops noticeably or TDS creep indicates declining rejection. Hard water and high sediment shorten lifespan toward 2-year mark\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"schedule-card\"\u003e\n\u003cdiv class=\"interval\"\u003eEvery 6-12 Months\u003c\/div\u003e\n\u003ch4\u003ePre-Filters (Sediment \u0026amp; Carbon)\u003c\/h4\u003e\n\u003cp\u003eReplace sediment and carbon pre-filters on schedule to protect membrane from fouling and chlorine damage. Membrane life depends on proper pre-filtration\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"schedule-card\"\u003e\n\u003cdiv class=\"interval\"\u003eQuarterly\u003c\/div\u003e\n\u003ch4\u003ePerformance Check\u003c\/h4\u003e\n\u003cp\u003eTest TDS levels of product water with handheld meter. Properly functioning membrane should reject 90-97% of dissolved solids depending on source water chemistry\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"benefits-strip\"\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e💰\u003c\/div\u003e\n\u003ch4\u003eLower Water Bills\u003c\/h4\u003e\n\u003cp\u003e1:1 efficiency ratio cuts drain water waste by 75% compared to traditional 4:1 membranes, reducing annual water and sewer costs\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e⏱️\u003c\/div\u003e\n\u003ch4\u003e5-Minute Installation\u003c\/h4\u003e\n\u003cp\u003eEncapsulated design with pre-installed fittings and check valve means you're pushing connections together, not wrenching housings apart\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e🏭\u003c\/div\u003e\n\u003ch4\u003eFactory Tested\u003c\/h4\u003e\n\u003cp\u003eEvery Pentair TLC membrane is performance-verified before shipment, meeting strict rejection and flow rate specifications\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e🌍\u003c\/div\u003e\n\u003ch4\u003eEco-Conscious Choice\u003c\/h4\u003e\n\u003cp\u003eHigh-efficiency ratio reduces environmental impact of RO filtration while maintaining the contaminant rejection you expect from reverse osmosis\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Pentair","offers":[{"title":"36 GPD","offer_id":35641365954722,"sku":"4002573 (GRO-36EN)","price":111.82,"currency_code":"USD","in_stock":true},{"title":"50 GPD","offer_id":35641365987490,"sku":"4002574 (GRO-50EN)","price":136.23,"currency_code":"USD","in_stock":true},{"title":"75 GPD","offer_id":35641366020258,"sku":"4002575 (GRO-75EN)","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/pentair-gro-encapsulated-replacement-reverse-osmosis-membrane-with-check-valve-11-ratio-459835.png?v=1791927323"},{"product_id":"pentair-tlc-replacement-reverse-osmosis-membrane-element","title":"Pentair (TLC) Replacement Reverse Osmosis Membrane Element","description":"\n\u003clink href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Serif+Display:ital@0;1\u0026amp;family=DM+Sans:wght@300;400;500;600\u0026amp;display=swap\" rel=\"stylesheet\"\u003e\n\u003cstyle\u003e\n  .ro-wrap {\n    --deep:#0a1628;--ocean:#0f3460;--blue:#1565c0;--sky:#2196f3;--aqua:#4dd0e1;\n    --white:#ffffff;--offwhite:#f2f7fc;--slate:#dce8f5;--text:#0d1f38;--muted:#4a6280;\n    --gold:#f59e0b;--radius:12px;\n    font-family:'DM 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.sc-note,\n  .ro-wrap .pro-tip p {\n    font-size: 18px !important;\n    line-height: 1.6 !important;\n  }\n  .ro-wrap h2 { font-size: clamp(26px,4vw,40px) !important; line-height:1.15 !important; }\n  .ro-wrap h3 { font-size: 20px !important; line-height:1.3 !important; }\n  .ro-wrap h4 { font-size: 18px !important; line-height:1.3 !important; }\n  .ro-wrap .ro-label,\n  .ro-wrap .stage-tag,\n  .ro-wrap .sc-label { font-size: 14px !important; }\n  .ro-wrap .ro-title { font-size: 24px !important; }\n  .ro-wrap .interval { font-size: 22px !important; }\n  .ro-wrap .stage-num { font-size: 16px !important; }\n  .ro-wrap .ro-eyebrow { font-size: 14px !important; }\n  .ro-wrap .ro-badge { font-size: 15px !important; }\n\u003c\/style\u003e\n\u003cdiv class=\"ro-wrap\"\u003e\n\n\u003cdiv class=\"ro-hero\"\u003e\n\u003cdiv class=\"ro-eyebrow\"\u003ePentair Residential RO Membrane\u003c\/div\u003e\n\u003ch2\u003ePentair \u003cem\u003eTLC Replacement Reverse Osmosis Membrane Element\u003c\/em\u003e\n\u003c\/h2\u003e\n\u003cp class=\"ro-tagline\"\u003eThin layer composite membrane engineered for reliable rejection and long shelf life across a wide range of residential water conditions\u003c\/p\u003e\n\u003cdiv class=\"ro-badges\"\u003e\n\u003cspan class=\"ro-badge\"\u003eNSF\/ANSI 58 Certified\u003c\/span\u003e\n\u003cspan class=\"ro-badge\"\u003e24 GPD\u003c\/span\u003e\n\u003cspan class=\"ro-badge\"\u003e98% NaCl Rejection\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eWHY IT WORKS\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eState-of-the-art filtration for demanding water sources\u003c\/h3\u003e\n\u003cdiv class=\"ro-feature-grid\"\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003cdiv class=\"ro-feat-icon\"\u003e\u003cspan\u003e🧬\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003eThin Layer Composite Design\u003c\/h3\u003e\n\u003cp\u003eAdvanced TLC membrane structure delivers consistent high rejection rates even when facing elevated TDS input water\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003cdiv class=\"ro-feat-icon\"\u003e\u003cspan\u003e📦\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003e100% Dry Packaging\u003c\/h3\u003e\n\u003cp\u003eFactory-sealed dry packaging extends shelf life and ensures membrane integrity until installation\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003cdiv class=\"ro-feat-icon\"\u003e\u003cspan\u003e🔧\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003eStandard Dimensions\u003c\/h3\u003e\n\u003cp\u003eBuilt to 1.79\" x 11.75\" standard sizing for drop-in compatibility with common residential membrane housings\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003cdiv class=\"ro-feat-icon\"\u003e\u003cspan\u003e✓\u003c\/span\u003e\u003c\/div\u003e\n\u003ch3\u003eNSF\/ANSI 58 Certified\u003c\/h3\u003e\n\u003cp\u003eIndependently tested and certified to meet rigorous reverse osmosis drinking water treatment system standards\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eSPECIFICATIONS\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eTechnical Details\u003c\/h3\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctr\u003e\n\u003ctd class=\"spec-label\"\u003eMembrane Type\u003c\/td\u003e\n\u003ctd class=\"spec-value\"\u003eThin Layer Composite (TLC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spec-label\"\u003eProduction Rate\u003c\/td\u003e\n\u003ctd class=\"spec-value\"\u003e24 gallons per day\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spec-label\"\u003eDimensions\u003c\/td\u003e\n\u003ctd class=\"spec-value\"\u003e1.79\" diameter × 11.75\" length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spec-label\"\u003eNaCl Rejection\u003c\/td\u003e\n\u003ctd class=\"spec-value\"\u003e98% nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spec-label\"\u003eCertification\u003c\/td\u003e\n\u003ctd class=\"spec-value\"\u003eNSF\/ANSI Standard 58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"spec-label\"\u003ePackaging\u003c\/td\u003e\n\u003ctd class=\"spec-value\"\u003e100% dry sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eCOMPATIBILITY\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eFits standard residential RO systems\u003c\/h3\u003e\n\u003cp\u003eThe Pentair TLC membrane element is built to industry-standard 1.79\" × 11.75\" dimensions and fits most residential reverse osmosis systems with compatible membrane housings. Suitable for systems requiring 24 GPD membrane production capacity. Verify your system's membrane specifications before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eMAINTENANCE\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eReplacement schedule\u003c\/h3\u003e\n\u003cdiv class=\"filter-schedule\"\u003e\n\u003cdiv class=\"schedule-card\"\u003e\n\u003cdiv class=\"interval\"\u003eEvery 2-3 Years\u003c\/div\u003e\n\u003ch4\u003eRO Membrane Replacement\u003c\/h4\u003e\n\u003cp\u003eReplace the Pentair TLC membrane element based on water quality testing or when production rate declines noticeably\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"schedule-card\"\u003e\n\u003cdiv class=\"interval\"\u003eEvery 6-12 Months\u003c\/div\u003e\n\u003ch4\u003ePre-Filter Cartridges\u003c\/h4\u003e\n\u003cp\u003eReplace sediment and carbon pre-filters regularly to protect membrane from fouling and extend service life\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"schedule-card\"\u003e\n\u003cdiv class=\"interval\"\u003eAnnual\u003c\/div\u003e\n\u003ch4\u003eSystem Sanitization\u003c\/h4\u003e\n\u003cp\u003eSanitize RO system and storage tank when replacing membrane to maintain water quality and system performance\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"benefits-strip\"\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e🏆\u003c\/div\u003e\n\u003ch4\u003eNSF Certified Quality\u003c\/h4\u003e\n\u003cp\u003eThird-party tested to NSF\/ANSI 58 for contaminant reduction performance\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e💧\u003c\/div\u003e\n\u003ch4\u003eHigh TDS Stability\u003c\/h4\u003e\n\u003cp\u003eMaintains rejection rates even with challenging high-TDS source water\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e📏\u003c\/div\u003e\n\u003ch4\u003eUniversal Fit\u003c\/h4\u003e\n\u003cp\u003eStandard dimensions ensure compatibility with most residential RO housings\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e⏳\u003c\/div\u003e\n\u003ch4\u003eExtended Shelf Life\u003c\/h4\u003e\n\u003cp\u003eDry packaging allows for long-term storage without performance degradation\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Pentair","offers":[{"title":"36 GPD","offer_id":35642327957666,"sku":"655007-00","price":59.62,"currency_code":"USD","in_stock":true},{"title":"50 GPD","offer_id":35642327990434,"sku":"555694-00","price":74.96,"currency_code":"USD","in_stock":true},{"title":"75 GPD","offer_id":35642328055970,"sku":"555693-00","price":70.52,"currency_code":"USD","in_stock":true},{"title":"100 GPD","offer_id":35642328088738,"sku":"655045-00","price":134.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/pentair-tlc-replacement-reverse-osmosis-membrane-element-226856.jpg?v=1791927323"},{"product_id":"ipw-industries-inc-compatible-to-pentair™-gro-2550-50-gpd-4-stage-ro-replacement-water-filters-includes-4002574-50-gpd-sediment-carbon-block-inline-with-3-8-quick-connect","title":"IPW Industries Inc. Compatible to Pentair™ GRO-2550 50 GPD 4-Stage RO Replacement Water Filters | Includes 4002574 50 GPD, Sediment, Carbon Block, Inline with 3\/8\" Quick Connect","description":"\n\u003clink href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Serif+Display:ital@0;1\u0026amp;family=DM+Sans:wght@300;400;500;600\u0026amp;display=swap\" rel=\"stylesheet\"\u003e\n\u003cstyle\u003e\n  .ro-wrap {\n    --deep:#0a1628;--ocean:#0f3460;--blue:#1565c0;--sky:#2196f3;--aqua:#4dd0e1;\n    --white:#ffffff;--offwhite:#f2f7fc;--slate:#dce8f5;--text:#0d1f38;--muted:#4a6280;\n    --gold:#f59e0b;--radius:12px;\n    font-family:'DM Sans',sans-serif;color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-wrap:break-word;word-break:break-word;min-width:0;\n  }\n  .ro-wrap .ro-hero{background:linear-gradient(135deg,var(--deep) 0%,var(--ocean) 50%,#1a5276 100%);color:var(--white);padding:52px 40px 44px;position:relative;overflow:hidden;border-radius:var(--radius) var(--radius) 0 0;}\n  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var(--slate);border-radius:var(--radius);padding:20px 18px;}\n  .ro-wrap .ro-feat-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--ocean),var(--sky));border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:12px;}\n  .ro-wrap .ro-feature-card h3{font-size:20px !important;font-weight:600;color:var(--deep);margin-bottom:6px;}\n  .ro-wrap .ro-feature-card p{font-size:18px !important;color:var(--muted);line-height:1.55;margin:0;}\n  .ro-wrap .pro-tip{display:block;background:#fffbeb;border:1px solid #f5d87a;border-radius:var(--radius);padding:18px 20px;margin-top:20px;box-sizing:border-box;width:100% !important;}\n  .ro-wrap .pro-tip-icon{font-size:22px !important;display:inline;margin-right:8px;line-height:1.6 !important;}\n  .ro-wrap .pro-tip p{font-size:18px !important;color:#5a4500;line-height:1.6 !important;margin:0;display:block;width:100%;}\n  .ro-wrap .pro-tip strong{color:#3d2e00;}\n  .ro-wrap .install-steps{counter-reset:step;list-style:none;padding:0;margin:4px 0 0;display:flex;flex-direction:column;gap:14px;}\n  .ro-wrap .install-steps li{counter-increment:step;display:flex;align-items:flex-start;gap:14px;font-size:18px !important;color:var(--text);}\n  .ro-wrap .install-steps li::before{content:counter(step);display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--ocean);color:white;font-size:15px !important;font-weight:700;flex-shrink:0;margin-top:1px;}\n  .ro-wrap .filter-schedule{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(180px,100%),1fr));gap:12px;margin-top:4px;}\n  .ro-wrap .schedule-card{background:var(--offwhite);border:1px solid var(--slate);border-radius:var(--radius);padding:16px;}\n  .ro-wrap .schedule-card .interval{font-size:22px !important;font-family:'DM Serif Display',serif;color:var(--sky);font-weight:400;margin-bottom:4px;}\n  .ro-wrap .schedule-card h4{font-size:18px 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var(--slate);border-radius:var(--radius);padding:18px;text-align:center;}\n  .ro-wrap .faucet-icon{font-size:28px !important;margin-bottom:10px;}\n  .ro-wrap .faucet-card h4{font-size:18px !important;font-weight:600;color:var(--deep);margin-bottom:6px;}\n  .ro-wrap .faucet-card p{font-size:15px !important;color:var(--muted);line-height:1.5;margin:0;}\n  .ro-wrap .spec-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(180px,100%),1fr));gap:12px;margin-top:4px;}\n  .ro-wrap .spec-card{background:var(--offwhite);border:1px solid var(--slate);border-radius:var(--radius);padding:16px;}\n  .ro-wrap .spec-card .sc-label{font-size:13px !important;font-weight:700;letter-spacing:.08em;color:var(--sky);text-transform:uppercase;margin-bottom:4px;}\n  .ro-wrap .spec-card .sc-value{font-size:20px !important;font-weight:600;color:var(--deep);margin-bottom:4px;}\n  .ro-wrap .spec-card .sc-note{font-size:15px !important;color:var(--muted);}\n  @media(max-width:640px){\n    .ro-wrap .ro-hero{padding:36px 24px 32px;}\n    .ro-wrap .ro-section{padding:28px 20px;}\n    .ro-wrap .ro-feature-grid,.ro-wrap .faucet-grid,.ro-wrap .filter-schedule,.ro-wrap .spec-cards{grid-template-columns:1fr;}\n    .ro-wrap .benefits-strip{flex-direction:column;}\n    .ro-wrap .benefit-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.1);}\n  }\n  \/* ── Nuclear override — force all text inside ro-wrap to be readable ── *\/\n  .ro-wrap p,\n  .ro-wrap li,\n  .ro-wrap td,\n  .ro-wrap th,\n  .ro-wrap .ro-section \u003e p {\n    font-size: 18px !important;\n    line-height: 1.6 !important;\n  }\n  .ro-wrap .ro-section \u003e p,\n  .ro-wrap .ro-callout p,\n  .ro-wrap .stage-body p,\n  .ro-wrap .ro-feature-card p,\n  .ro-wrap .schedule-card p,\n  .ro-wrap .faucet-card p,\n  .ro-wrap .spec-card .sc-note,\n  .ro-wrap .pro-tip p {\n    font-size: 18px !important;\n    line-height: 1.6 !important;\n  }\n  .ro-wrap h2 { font-size: clamp(26px,4vw,40px) !important; line-height:1.15 !important; }\n  .ro-wrap h3 { font-size: 20px !important; line-height:1.3 !important; }\n  .ro-wrap h4 { font-size: 18px !important; line-height:1.3 !important; }\n  .ro-wrap .ro-label,\n  .ro-wrap .stage-tag,\n  .ro-wrap .sc-label { font-size: 14px !important; }\n  .ro-wrap .ro-title { font-size: 24px !important; }\n  .ro-wrap .interval { font-size: 22px !important; }\n  .ro-wrap .stage-num { font-size: 16px !important; }\n  .ro-wrap .ro-eyebrow { font-size: 14px !important; }\n  .ro-wrap .ro-badge { font-size: 15px !important; }\n\u003c\/style\u003e\n\u003cdiv class=\"ro-wrap\"\u003e\n\n\u003cdiv class=\"ro-callout\"\u003e\nThis 4-stage reverse osmosis replacement filter kit delivers complete system renewal for Pentair GRO-2550 50 GPD systems with a high-efficiency encapsulated membrane (4002574), sediment and carbon block pre-filters, and an inline GAC post-filter with 3\/8\" quick connect fittings. Built with coconut shell activated carbon and 5-micron nominal filtration across sediment and carbon stages, this kit restores optimal performance in residential and light commercial RO installations.\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eWHAT'S INCLUDED\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eComplete 4-Stage Filter Set\u003c\/h2\u003e\n\u003cdiv class=\"stage-pipeline\"\u003e\n\u003cdiv class=\"stage-card\"\u003e\n\u003cdiv class=\"stage-tag\"\u003eSEDIMENT\u003c\/div\u003e\n\u003cdiv class=\"stage-name\"\u003e5 Micron Polypropylene\u003c\/div\u003e\n\u003cdiv class=\"stage-desc\"\u003eCoreless design removes sediment, rust, and particulate down to 5 microns with high dirt-holding capacity\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"stage-card\"\u003e\n\u003cdiv class=\"stage-tag\"\u003eCARBON\u003c\/div\u003e\n\u003cdiv class=\"stage-name\"\u003eCoconut Shell Carbon Block\u003c\/div\u003e\n\u003cdiv class=\"stage-desc\"\u003eAcid-washed activated carbon removes chlorine, taste, odor, and chemical contaminants with minimal fines\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"stage-card\"\u003e\n\u003cdiv class=\"stage-tag\"\u003eMEMBRANE\u003c\/div\u003e\n\u003cdiv class=\"stage-name\"\u003e50 GPD Encapsulated RO\u003c\/div\u003e\n\u003cdiv class=\"stage-desc\"\u003eThin Layer Composite membrane (4002574) with 96% rejection rate and 1:1 waste ratio for water-efficient filtration\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"stage-card\"\u003e\n\u003cdiv class=\"stage-tag\"\u003ePOLISH\u003c\/div\u003e\n\u003cdiv class=\"stage-name\"\u003eInline GAC w\/ 3\/8\" QC\u003c\/div\u003e\n\u003cdiv class=\"stage-desc\"\u003eFinal stage coconut shell GAC filter removes residual taste and odor, rated for 2,500 gallons or one year\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eSPECIFICATIONS\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eSystem Performance \u0026amp; Dimensions\u003c\/h2\u003e\n\u003cdiv class=\"spec-cards\"\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eRO Membrane Output\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e50 GPD\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eEncapsulated design with check valve and flow restrictor\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eSediment \u0026amp; Carbon Rating\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e5 Micron Nominal\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eStandard 10\" x 2.5\" cartridge format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eMembrane Dimensions\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e2.5\" x 15.14\"\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eWith 1\/4\" quick connect fittings\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eInline Filter Length\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e10\" x 2\" OD\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003e3\/8\" quick connect, 0.5 GPM flow\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eRejection Rate\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e96%\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eTDS removal with 1:1 waste-to-product ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eInline Filter Capacity\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e2,500 Gallons\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eOr 12 months maximum service life\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eTECHNICAL DETAILS\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eMaterials \u0026amp; Operating Parameters\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eSediment Filter Construction\u003c\/td\u003e\n\u003ctd\u003e100% polypropylene coreless design, thermal bond\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarbon Block Media\u003c\/td\u003e\n\u003ctd\u003eAcid-washed coconut shell activated carbon, high purity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMembrane Technology\u003c\/td\u003e\n\u003ctd\u003eThin Layer Composite (TLC) for enhanced water recovery efficiency\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInline GAC Media\u003c\/td\u003e\n\u003ctd\u003eCoconut shell granular activated carbon for taste and odor reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e35 to 100°F (inline filter), standard for sediment and carbon stages\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Pressure\u003c\/td\u003e\n\u003ctd\u003e125 PSI (inline filter), compatible with residential water pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMembrane Included Components\u003c\/td\u003e\n\u003ctd\u003eDrain line flow control, permeate check valve, 1\/4\" quick connect fittings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eCOMPATIBILITY \u0026amp; APPLICATIONS\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eCompatible Systems \u0026amp; Uses\u003c\/h2\u003e\n\u003cp\u003eThis filter set is engineered as a direct replacement for Pentair GRO-2550 50 GPD reverse osmosis systems. The 4002574 encapsulated membrane matches OEM specifications for drop-in installation without modification. Standard 10\" sediment and carbon cartridges fit most residential RO pre-filter housings. The inline GAC filter with 3\/8\" quick connect fittings integrates into post-filter lines for refrigerators, ice makers, coffee equipment, and final-stage polishing in drinking water applications. Suitable for residential point-of-use systems, light commercial beverage applications, and any installation requiring Pentair GRO-2550 annual filter replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pro-tip\"\u003e\n💧 The encapsulated membrane's 1:1 waste ratio means this system sends half as much water down the drain compared to traditional 3:1 ratio membranes—cutting waste water costs while maintaining the same 50 GPD output and 96% TDS rejection performance.\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Isopure Water","offers":[{"title":"Cartridges + compatible PureT EZRO-50 membrane","offer_id":48233262579883,"sku":"(1) Sed (1) CB (1) 3\/8\" QC (1) EZRO-50","price":107.99,"currency_code":"USD","in_stock":true},{"title":"Cartridges + genuine Pentair GRO-50EN membrane","offer_id":48233262612651,"sku":"(1) Sed (1) CB (1) 3\/8\" QC (1) GRO-50EN","price":137.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/product-8286615732395-padded.jpg?v=1777266259"},{"product_id":"ipw-industries-inc-compatible-to-franklin-electric-pentair-green-ro-gro-50-5-5-stage-50-gpd-replacement-water-filter-set-sediment-2-carbon-block-inline-post-carbon-optional-1-1-high-recovery-membrane","title":"IPW Industries Inc. Compatible to Franklin Electric \/ Pentair Green RO GRO-50-5 (5-Stage 50 GPD) Replacement Water Filter Set | Sediment + (2) Carbon Block + Inline Post-Carbon | Optional 1:1 High-Recovery Membrane","description":"\u003cstyle\u003e@import url('https:\/\/fonts.googleapis.com\/css2?family=DM+Serif+Display\u0026family=DM+Sans:wght@400;500;600;700\u0026display=swap');.ro-wrap{--deep:#0a1628;--ocean:#0f3460;--blue:#1565c0;--sky:#2196f3;--aqua:#4dd0e1;--white:#ffffff;--offwhite:#f2f7fc;--slate:#dce8f5;--text:#0d1f38;--muted:#5a6f88;font-family:'DM Sans',system-ui,sans-serif!important;color:var(--text)!important;line-height:1.65!important;max-width:900px!important;margin:0 auto!important}.ro-wrap *{box-sizing:border-box!important}.ro-wrap .ro-hero{background:linear-gradient(135deg,var(--deep),var(--ocean) 55%,#1a5276)!important;color:#fff!important;border-radius:16px!important;padding:36px 32px!important}.ro-wrap .ro-eyebrow{text-transform:uppercase!important;letter-spacing:.16em!important;font-size:12px!important;font-weight:600!important;color:var(--aqua)!important;margin-bottom:10px!important}.ro-wrap .ro-hero h2{font-family:'DM Serif Display',serif!important;font-weight:400!important;font-size:clamp(23px,3.2vw,32px)!important;line-height:1.2!important;margin:0 0 12px!important;color:#fff!important}.ro-wrap .ro-tag{font-size:16px!important;color:rgba(255,255,255,.85)!important;margin:0!important}.ro-wrap .ro-badges{margin-top:18px!important;display:flex!important;flex-wrap:wrap!important;gap:8px!important}.ro-wrap .ro-badge{background:rgba(77,208,225,.14)!important;border:1px solid rgba(77,208,225,.45)!important;color:#cdf3f8!important;font-size:12.5px!important;font-weight:600!important;padding:6px 12px!important;border-radius:20px!important}.ro-wrap .ro-callout{background:var(--offwhite)!important;border-left:4px solid var(--sky)!important;border-radius:10px!important;padding:18px 20px!important;margin:26px 0!important;font-size:15.5px!important}.ro-wrap h3.ro-h{font-family:'DM Serif Display',serif!important;font-weight:400!important;font-size:22px!important;margin:34px 0 12px!important;color:var(--text)!important}.ro-wrap .spec-cards{display:grid!important;grid-template-columns:repeat(auto-fit,minmax(190px,1fr))!important;gap:14px!important}.ro-wrap .spec-card{background:#fff!important;border:1px solid var(--slate)!important;border-radius:12px!important;padding:16px 18px!important}.ro-wrap .spec-card .k{text-transform:uppercase!important;letter-spacing:.1em!important;font-size:11px!important;color:var(--muted)!important;font-weight:700!important}.ro-wrap .spec-card .v{font-size:17px!important;font-weight:700!important;color:var(--ocean)!important;margin-top:5px!important}.ro-wrap .kit-list{list-style:none!important;padding:0!important;margin:0!important}.ro-wrap .kit-list li{background:#fff!important;border:1px solid var(--slate)!important;border-radius:10px!important;padding:13px 16px!important;margin-bottom:10px!important;font-size:15.5px!important}.ro-wrap .kit-list li b{color:var(--ocean)!important}.ro-wrap table.specs-table{width:100%!important;border-collapse:collapse!important;font-size:15px!important}.ro-wrap table.specs-table td{border-bottom:1px solid var(--slate)!important;padding:11px 8px!important}.ro-wrap table.specs-table td:first-child{color:var(--muted)!important;width:44%!important}.ro-wrap table.specs-table td:last-child{font-weight:600!important}.ro-wrap .ro-feature-grid{display:grid!important;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))!important;gap:14px!important}.ro-wrap .ro-feature{background:var(--offwhite)!important;border:1px solid var(--slate)!important;border-radius:12px!important;padding:16px 18px!important}.ro-wrap .ro-feature h4{margin:0 0 6px!important;font-size:16px!important;color:var(--ocean)!important}.ro-wrap .ro-feature p{margin:0!important;font-size:14.5px!important;color:var(--muted)!important}.ro-wrap .pro-tip{background:#e8f7ee!important;border:1px solid #b6e2c6!important;color:#137a3a!important;border-radius:12px!important;padding:14px 18px!important;margin-top:14px!important;font-size:14.5px!important;font-weight:600!important}.ro-wrap ol.install-steps{padding-left:20px!important;font-size:15.5px!important}.ro-wrap ol.install-steps li{margin-bottom:9px!important}.ro-wrap .benefits-strip{display:flex!important;flex-wrap:wrap!important;gap:12px 28px!important;background:var(--deep)!important;color:rgba(255,255,255,.88)!important;border-radius:14px!important;padding:20px 24px!important;margin-top:30px!important;font-size:14.5px!important}\u003c\/style\u003e\n\u003cdiv class=\"ro-wrap\"\u003e\n\u003cdiv class=\"ro-hero\"\u003e\n\u003cdiv class=\"ro-eyebrow\"\u003eFranklin Electric \/ Pentair · Green RO GRO-50-5 · 5-Stage\u003c\/div\u003e\n\u003ch2\u003eEvery cartridge your Green RO GRO-50-5 needs, in one set\u003c\/h2\u003e\n\u003cp class=\"ro-tag\"\u003eDirect-fit replacements for the 5-stage 50 GPD Green RO — one sediment pre-filter, two carbon blocks, and the inline post-carbon polish. Add the 1:1 high-recovery encapsulated membrane if you are due for one.\u003c\/p\u003e\n\u003cdiv class=\"ro-badges\"\u003e\n\u003cspan class=\"ro-badge\"\u003eFits GRO-50-5 · GRO-50-5-WHT-BR\u003c\/span\u003e\u003cspan class=\"ro-badge\"\u003eStandard 10\" x 2.5\" housings\u003c\/span\u003e\u003cspan class=\"ro-badge\"\u003eShips from California\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-callout\"\u003e\n\u003cb\u003eRead this before you order a membrane.\u003c\/b\u003e The Green RO is a \u003cb\u003ehigh-recovery\u003c\/b\u003e system — its encapsulated element runs roughly \u003cb\u003e1 gallon to drain per 1 gallon produced\u003c\/b\u003e instead of the 4:1 a conventional RO wastes. A standard 1812 TFC membrane will physically connect but will \u003cb\u003enot\u003c\/b\u003e reproduce that recovery ratio, and the built-in 150 mL\/min flow control will be wrong. Use an encapsulated GRO-style element only.\u003c\/div\u003e\n\n\u003ch3 class=\"ro-h\"\u003eAt a glance\u003c\/h3\u003e\n\u003cdiv class=\"spec-cards\"\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"k\"\u003eSystem\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003eGreen RO GRO-50-5\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"k\"\u003eStages\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003e5\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"k\"\u003eProduction\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003e50 GPD\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"k\"\u003eRecovery\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003e1:1 high-recovery\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 class=\"ro-h\"\u003eWhat is in the set\u003c\/h3\u003e\n\u003cul class=\"kit-list\"\u003e\n\u003cli\u003e\n\u003cb\u003eStage 1 - Sediment pre-filter.\u003c\/b\u003e IPW 10\" x 2.5\" melt-blown polypropylene, 5 micron. Replaces OEM 93023.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStage 2 - Carbon block.\u003c\/b\u003e IPW 10\" x 2.5\" coconut-shell carbon block, 5 micron. Replaces OEM OMB934-5M.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStage 3 - Carbon block (second pass).\u003c\/b\u003e Same cartridge as stage 2 - the GRO-50-5 runs two in series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStage 5 - Inline post-carbon.\u003c\/b\u003e 2\" x 10\" GAC polishing filter with 1\/4\" female NPT ends. Replaces OEM CL10ROT33-BB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStage 4 - RO membrane (optional).\u003c\/b\u003e Choose the set with the PureT EZRO-50 or the genuine Pentair 4002574 (GRO-50EN) encapsulated 1:1 element, each with an integral check valve.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"pro-tip\"\u003eTip: the membrane is on a 2-year cycle while the four cartridges are on a 6-12 month cycle, so most customers buy the cartridge-only set twice, then a full set on the third change.\u003c\/div\u003e\n\n\u003ch3 class=\"ro-h\"\u003eTechnical details\u003c\/h3\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eFranklin Electric \/ Pentair Green RO GRO-50-5, GRO-50-5-WHT-BR, and the Ultima Green RO 5-stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStage 1 cartridge\u003c\/td\u003e\n\u003ctd\u003e10\" x 2.5\" melt-blown polypropylene, 5 micron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStages 2 and 3 cartridges\u003c\/td\u003e\n\u003ctd\u003e10\" x 2.5\" coconut carbon block, 5 micron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStage 4 membrane\u003c\/td\u003e\n\u003ctd\u003eEncapsulated 50 GPD high-recovery element with 1\/4\" quick-connect check valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStage 5 inline\u003c\/td\u003e\n\u003ctd\u003e2\" x 10\" granular activated carbon, 1\/4\" FPT both ends\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCartridge change interval\u003c\/td\u003e\n\u003ctd\u003e6 to 12 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMembrane change interval\u003c\/td\u003e\n\u003ctd\u003eApproximately 24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrain flow control\u003c\/td\u003e\n\u003ctd\u003e150 mL\/min, integral to the encapsulated element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 class=\"ro-h\"\u003eWhat sets it apart\u003c\/h3\u003e\n\u003cdiv class=\"ro-feature-grid\"\u003e\n\u003cdiv class=\"ro-feature\"\u003e\n\u003ch4\u003eMatched to the real stage list\u003c\/h4\u003e\n\u003cp\u003eTwo carbon blocks, not one. The GRO-50-5 is a 5-stage system and the widely sold 4-stage GRO kits leave you a cartridge short.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature\"\u003e\n\u003ch4\u003eKeeps the 1:1 recovery\u003c\/h4\u003e\n\u003cp\u003eThe optional membranes are encapsulated high-recovery elements, so the system keeps sending about a gallon to drain per gallon made instead of four.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature\"\u003e\n\u003ch4\u003eStandard housings\u003c\/h4\u003e\n\u003cp\u003eAll three vertical cartridges are ordinary 10\" x 2.5\" sizes, so there is no proprietary lock-in on the pre-filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature\"\u003e\n\u003ch4\u003eBuy the level you need\u003c\/h4\u003e\n\u003cp\u003eCartridges only, or cartridges plus the value or the genuine Pentair membrane.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 class=\"ro-h\"\u003eHow to change them\u003c\/h3\u003e\n\u003col class=\"install-steps\"\u003e\n\u003cli\u003eClose the feed valve at the cold-water supply, then close the ball valve on the storage tank.\u003c\/li\u003e\n\u003cli\u003eOpen the RO faucet and let it run until it stops, relieving pressure in the system.\u003c\/li\u003e\n\u003cli\u003eUnscrew the three vertical housings with the housing wrench. Empty them, wipe them out, and inspect each o-ring - lubricate with silicone grease or replace if flattened or nicked.\u003c\/li\u003e\n\u003cli\u003eDrop in the new sediment cartridge on the inlet side and the two new carbon blocks in the following positions. Hand-tighten each housing, then snug about a quarter turn with the wrench.\u003c\/li\u003e\n\u003cli\u003eIf you are changing the membrane, unthread the encapsulated element, note the flow direction arrow, and thread the replacement in the same orientation.\u003c\/li\u003e\n\u003cli\u003eReplace the inline post-carbon last. Note which end faces the faucet before you remove it and match the flow arrow on the new one.\u003c\/li\u003e\n\u003cli\u003eOpen the feed valve, check every joint for leaks, then open the tank valve. Fill and dump the first two tanks before drinking - this flushes carbon fines and the membrane preservative.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"pro-tip\"\u003eIf the water tastes flat or the faucet flow drops off after a change, it is almost always trapped air or a partially closed tank valve - not a bad cartridge. Flush a full tank and re-check.\u003c\/div\u003e\n\n\u003ch3 class=\"ro-h\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThis set is built for the Franklin Electric \/ Pentair Green RO 5-stage 50 GPD system, sold under model numbers such as GRO-50-5 and GRO-50-5-WHT-BR and as the Ultima Green RO 5-stage. The three vertical cartridges are standard 10\" x 2.5\" sizes and will also serve any other 5-stage under-sink RO that uses the same housings. The inline post-carbon here uses 1\/4\" female NPT ends - if your existing inline has push-in quick-connect fittings instead, order the 1\/4\" or 3\/8\" quick-connect version of that filter separately and keep the rest of this set.\u003c\/p\u003e\n\n\u003cdiv class=\"benefits-strip\"\u003e\n\u003cspan\u003eShips from California\u003c\/span\u003e\u003cspan\u003eGenuine and compatible options\u003c\/span\u003e\u003cspan\u003eBuild help: (877) 541-6603\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Isopure Water","offers":[{"title":"Cartridges only (4 pieces)","offer_id":47679548719275,"sku":"(1) 5M SED 1025 (2) CBC-10-5 (1) IL-10W-C-14","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Cartridges + PureT EZRO-50 membrane","offer_id":47679548752043,"sku":"(1) 5M SED 1025 (2) CBC-10-5 (1) IL-10W-C-14 (1) EZRO-50","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Cartridges + genuine Pentair GRO-50EN membrane","offer_id":47679548784811,"sku":"(1) 5M SED 1025 (2) CBC-10-5 (1) IL-10W-C-14 (1) 4002574","price":146.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/gro.jpg?v=1791928011"}],"url":"https:\/\/www.isopurewater.com\/collections\/pentair-ro-replacement-filters.oembed","provider":"Isopure Water","version":"1.0","type":"link"}