{"product_id":"ipw-ws1-whole-house-backwashing-carbon-filter","title":"IPW WS1 Whole House Backwashing Carbon Filter System — Coconut or Catalytic Carbon, 1.0–3.0 Cu Ft","description":"\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 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p,.ro-wrap .ro-callout p,.ro-wrap .ro-feature-card p,.ro-wrap .spec-card .sc-note,.ro-wrap .pro-tip p{font-size:18px !important;line-height:1.6 !important;}\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,.ro-wrap .sc-label{font-size:14px !important;}\n  .ro-wrap .ro-title{font-size:24px !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\"\u003eIsopure Water · Whole House Carbon Series\u003c\/div\u003e\n    \u003ch2\u003e\n\u003cem\u003eHigh Flow\u003c\/em\u003e Whole House Carbon Filter with IPW WS1 Timer Valve\u003c\/h2\u003e\n    \u003cp class=\"ro-tagline\"\u003eA 1\" high-flow backwashing carbon system that strips chlorine, chloramine, taste and odor from every tap in the house — built to order from 1.0 to 3.0 cubic feet, shipped unassembled or fully assembled.\u003c\/p\u003e\n    \u003cdiv class=\"ro-badges\"\u003e\n      \u003cspan class=\"ro-badge\"\u003e✓ 1\" High-Flow Valve · Up to 27 GPM\u003c\/span\u003e\n      \u003cspan class=\"ro-badge\"\u003e✓ Automatic Timer Backwash\u003c\/span\u003e\n      \u003cspan class=\"ro-badge\"\u003e✓ Coconut Shell or Catalytic Carbon\u003c\/span\u003e\n      \u003cspan class=\"ro-badge\"\u003e✓ 1.0 – 3.0 Cu Ft\u003c\/span\u003e\n      \u003cspan class=\"ro-badge\"\u003e✓ Unassembled or Fully Assembled\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003cdiv class=\"ro-callout\"\u003e\n\u003cp\u003eThis is the same recipe our \u003cstrong\u003eBuild Your System\u003c\/strong\u003e tool prices from — a complete backwashing carbon filter assembled from the individual parts we stock: a \u003cstrong\u003e1\" IPW WS1 electronic timer control valve\u003c\/strong\u003e, a NSF-listed Aquatrol mineral tank sized to the media charge, your choice of \u003cstrong\u003eactivated coconut shell carbon\u003c\/strong\u003e (chlorine, taste and odor) or \u003cstrong\u003ecatalytic carbon\u003c\/strong\u003e (chloramine and hydrogen sulfide), gravel underbed, internals, a quick-connect bypass with 1\" NPT elbow adapters, and the correct drain line flow control for the tank. No salt, no brine tank, no chemicals — the valve simply backwashes the bed on a schedule to lift and re-settle the carbon. Pick \u003cstrong\u003eUnassembled\u003c\/strong\u003e to ship as parcels and assemble in ten minutes, or \u003cstrong\u003eFully Assembled\u003c\/strong\u003e to receive it on a pallet, loaded and ready to plumb.\u003c\/p\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\"\u003eKey Performance Metrics\u003c\/h2\u003e\n\u003cdiv class=\"spec-cards\"\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eValve Service Flow\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eUp to 27 GPM\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003e1\" high-flow control head, Cv 7.4\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eValve Backwash Flow\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eUp to 27 GPM\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eActual rate set by the DLFC fitted for your tank\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eControl\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eElectronic Timer\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eTime-clock backwash, 1–28 day interval\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eMedia Options\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eCoconut or Catalytic\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eCatalytic for chloramine \/ H₂S\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eRecommended Service Rate\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e5 GPM \/ cu ft\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eCoconut; 3 GPM \/ cu ft catalytic for contact time\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003ePlumbing\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e1\" Valve · 1\" NPT\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eBypass + 1\" NPT elbow adapters included\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\"\u003eSIZE GUIDE\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003ePick the Media Charge for Your Home\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.0 cu ft · 9\" × 48\" tank\u003c\/td\u003e\n\u003ctd\u003eUp to ~5 GPM coconut \/ ~3 GPM catalytic. 1–2 bathrooms, apartments and small homes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.5 cu ft · 10\" × 54\" tank\u003c\/td\u003e\n\u003ctd\u003eUp to ~7.5 GPM coconut \/ ~4.5 GPM catalytic. 2–3 bathrooms — the most common residential size.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2.0 cu ft · 12\" × 52\" tank\u003c\/td\u003e\n\u003ctd\u003eUp to ~10 GPM coconut \/ ~6 GPM catalytic. 3–4 bathrooms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2.5 cu ft · 13\" × 54\" tank\u003c\/td\u003e\n\u003ctd\u003eUp to ~12.5 GPM coconut \/ ~7.5 GPM catalytic. 4–5 bathrooms or larger homes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3.0 cu ft · 14\" × 65\" tank\u003c\/td\u003e\n\u003ctd\u003eUp to ~15 GPM coconut \/ ~9 GPM catalytic. 5+ bathrooms, estates, light commercial.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"pro-tip\"\u003e\n\u003cp\u003e\u003cspan class=\"pro-tip-icon\"\u003e💡\u003c\/span\u003e\u003cstrong\u003eSize by peak flow, not by pipe size.\u003c\/strong\u003e Carbon needs contact time to work — a bed that is too small for your peak demand lets chlorine slip through. Count bathrooms, add one size if the home is over 4,000 sq ft, and go one size larger again if you are on chloramine and choosing catalytic carbon. Not sure? Run your address through our \u003cstrong\u003eBuild Your System\u003c\/strong\u003e tool and it will size and price the exact same build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eWS1 OR WS 1.25?\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eWhich Valve Should You Buy?\u003c\/h2\u003e\n\u003cp\u003eThis is the standard 1\" valve. We also sell the identical carbon filter with the larger IPW WS 1.25 valve, and most customers ask which to buy. The two valves are the same platform — same timer board, same programming, same seals, piston and backwash cycle, same tank, media and internals. The WS 1.25 has larger ports and internal passages, which raises the valve's own flow ceiling and lowers its pressure drop at a given flow. On a carbon filter that matters even less than on a softener, because carbon is sized by contact time: the media bed itself is rated at 5 GPM per cubic foot (3 GPM for catalytic), so even the largest 3.0 cu ft bed tops out around 15 GPM — well under what either valve can pass.\u003c\/p\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet \/ outlet\u003c\/td\u003e\n\u003ctd\u003eWS1: 1\" · WS 1.25: 1-1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve service flow (15 psi drop)\u003c\/td\u003e\n\u003ctd\u003eWS1: 27 GPM · WS 1.25: 34 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve pressure drop at 10 GPM (approx.)\u003c\/td\u003e\n\u003ctd\u003eWS1: ~1.8 psi · WS 1.25: ~1.3 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve pressure drop at 15 GPM (approx.)\u003c\/td\u003e\n\u003ctd\u003eWS1: ~4 psi · WS 1.25: ~3 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhat actually limits flow\u003c\/td\u003e\n\u003ctd\u003eThe carbon bed: 1.0 cf ≈ 5 GPM, 1.5 cf ≈ 7.5, 2.0 cf ≈ 10, 2.5 cf ≈ 12.5, 3.0 cf ≈ 15 GPM (coconut; ~40% less for catalytic). Push past that and chlorine slips through regardless of valve size.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice difference\u003c\/td\u003e\n\u003ctd\u003eAbout $180 more for the WS 1.25, same tank and media\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"ro-feature-grid\" style=\"margin-top:20px\"\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eGet the WS1 if…\u003c\/h3\u003e\n\u003cp\u003eYour main line is 3\/4\" or 1\" (nearly every home) and you are buying any size up to 3.0 cu ft for residential use. The bed, not the valve, sets your flow, so the $180 is better spent going up one media size — which actually improves chlorine removal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eGet the WS 1.25 if…\u003c\/h3\u003e\n\u003cp\u003eYour supply line is 1-1\/4\" or larger and you don't want to neck it down, you are running two or more filters in parallel or a light-commercial line, or incoming pressure is already low (under ~50 psi) and you need to shave every psi of drop through the treatment train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pro-tip\"\u003e\n\u003cp\u003e\u003cspan class=\"pro-tip-icon\"\u003e💡\u003c\/span\u003e\u003cstrong\u003eMatch the plumbing, not the price tag.\u003c\/strong\u003e A WS 1.25 connected with 1\" adapters into a 1\" main gains you nothing — the pipe is the restriction. If you buy the WS 1.25, ask us for 1-1\/4\" connection adapters so the whole path is full-size. If your main is 1\", buy the WS1 and put the savings into a bigger carbon bed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eWHAT’S IN THE BOX\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eEverything Needed for a Working System\u003c\/h2\u003e\n\u003cul class=\"kit-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eIPW WS1 electronic timer backwash valve\u003c\/strong\u003e — 1\" high-flow control head with weather-tight cover\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAquatrol fiberglass mineral tank\u003c\/strong\u003e — NSF-listed, 9\" to 14\" diameter to match the media charge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarbon media\u003c\/strong\u003e — 1 cu ft bags of activated coconut shell or catalytic carbon, filled to the selected size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGravel underbed\u003c\/strong\u003e — supports the bed and spreads backwash flow evenly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistributor tube with lower basket + upper basket\u003c\/strong\u003e — 1.05\" riser internals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBypass valve + 1\" NPT male elbow adapters\u003c\/strong\u003e — isolate the filter without shutting off the house\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain line flow control (DLFC)\u003c\/strong\u003e — pre-selected for the tank diameter so the bed lifts without blowing carbon to drain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply\u003c\/strong\u003e — plug-in transformer, dry locations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"pro-tip\"\u003e\n\u003cp\u003e\u003cspan class=\"pro-tip-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eUnassembled vs. Fully Assembled.\u003c\/strong\u003e Unassembled ships as separate parcels (tank, valve, media bags) by ground — lowest cost, and loading a tank takes about ten minutes with a funnel. Fully Assembled adds freight: the tank is loaded, the valve is mounted and sealed, and the unit arrives on a pallet ready to set in place. Assembled systems weigh roughly 70–185 lb depending on size, so plan for help moving it.\u003c\/p\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\"\u003eSystem Construction\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Valve\u003c\/td\u003e\n\u003ctd\u003eIPW WS1 high-flow electronic timer valve, 1\" inlet\/outlet, backwash filter configuration (3-cycle: backwash, rinse, service)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Body\u003c\/td\u003e\n\u003ctd\u003eFiber-reinforced composite, 2-1\/2\" – 8 NPSM tank thread, NSF\/ANSI 61 and 372 listed; IP54\/IP55 electronics enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Board\u003c\/td\u003e\n\u003ctd\u003eSolid-state time-clock control, 1–28 day backwash override, adjustable cycle times, non-volatile memory, coin-cell backup with power-outage carry-over\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eDual-voltage plug-in transformer, 100–120V or 200–240V AC, 50\/60 Hz; 15 VDC to the valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMineral Tank\u003c\/td\u003e\n\u003ctd\u003eAquatrol poly-lined fiberglass-wound vessel, 2-1\/2\" – 8 top opening, 150 psi rated; 9x48 \/ 10x54 \/ 12x52 \/ 13x54 \/ 14x65 by media size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActivated Coconut Shell Carbon\u003c\/td\u003e\n\u003ctd\u003eHigh-iodine coconut shell GAC for chlorine, taste, odor and VOC reduction; 5 GPM\/cu ft design service rate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalytic Carbon\u003c\/td\u003e\n\u003ctd\u003eEnhanced coconut carbon for chloramine and hydrogen sulfide; 3 GPM\/cu ft design service rate for added contact time\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackwash Design Rate\u003c\/td\u003e\n\u003ctd\u003e10 GPM per sq ft of bed area; DLFC sized per tank (9\" ≈ 5.3 GPM, 10\" ≈ 6.5, 12\" ≈ 9.0, 13\" ≈ 10.0, 14\" ≈ 17.0 via 1\" drain fitting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnderbed\u003c\/td\u003e\n\u003ctd\u003eWashed gravel, approx. 12 lb per cubic foot of media\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBypass\u003c\/td\u003e\n\u003ctd\u003eQuick-connect bypass with two 1\" NPT male elbow adapters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Pressure\u003c\/td\u003e\n\u003ctd\u003e20 – 125 psi; install a pressure regulator above 80 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Temperature\u003c\/td\u003e\n\u003ctd\u003e35 – 110°F; indoor or shaded, non-freezing location\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrain\u003c\/td\u003e\n\u003ctd\u003e3\/4\" drain line minimum; 1\" recommended on 13\" and 14\" tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembled Weight (approx.)\u003c\/td\u003e\n\u003ctd\u003e1.0 cf ≈ 70 lb · 1.5 cf ≈ 95 lb · 2.0 cf ≈ 125 lb · 2.5 cf ≈ 150 lb · 3.0 cf ≈ 185 lb (tank + media + gravel + valve)\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\"\u003eWHAT SETS IT APART\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eWhy a High-Flow Backwashing Carbon System\u003c\/h2\u003e\n\u003cdiv class=\"ro-feature-grid\"\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eNo Pressure Drop Penalty\u003c\/h3\u003e\n\u003cp\u003eA 1\" valve rated to 27 GPM passes nearly twice what the largest carbon bed can treat, so the valve is never the restriction on a residential install.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eSelf-Cleaning Bed\u003c\/h3\u003e\n\u003cp\u003eScheduled backwash lifts the carbon, flushes trapped sediment to drain, and re-stratifies the bed — no cartridges to change, no channeling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eMedia Matched to Your Water\u003c\/h3\u003e\n\u003cp\u003eCoconut shell carbon for chlorinated city water; catalytic carbon when your utility uses chloramine or you are fighting sulfur odor on a well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eYears Between Media Changes\u003c\/h3\u003e\n\u003cp\u003eA properly sized bed typically runs 3–5 years on municipal water before the carbon is exhausted — then re-bed it with a bag of media, not a new system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eProtects Everything Downstream\u003c\/h3\u003e\n\u003cp\u003eRemoves the chlorine that attacks softener resin, RO membranes, rubber seals and water heater anodes — the right first stage in any treatment train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eBuilt from Stock Parts\u003c\/h3\u003e\n\u003cp\u003eEvery component is a part we sell individually, so service parts are always one click away and nothing is proprietary.\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\"\u003eINSTALLATION \u0026amp; USE\u003c\/div\u003e\n\u003ch2 class=\"ro-title\"\u003eGetting Set Up\u003c\/h2\u003e\n\u003col class=\"install-steps\"\u003e\n\u003cli\u003eSet the tank on a level, non-freezing surface near a floor drain or standpipe. Unassembled systems: tape the riser tube, pour in the gravel, then the carbon, remove the tape and thread on the valve hand-tight.\u003c\/li\u003e\n\u003cli\u003eSnap the bypass onto the valve, then plumb the inlet and outlet. Install upstream of any softener or RO so the carbon protects them from chlorine.\u003c\/li\u003e\n\u003cli\u003eRun a drain line to an air gap. Keep it as short and straight as possible — backwash on a 12\" or larger tank moves 9–17 GPM.\u003c\/li\u003e\n\u003cli\u003eWith the bypass in bypass, open the inlet slowly to fill the tank and purge air through the drain, then soak new carbon for 30–60 minutes to release fines.\u003c\/li\u003e\n\u003cli\u003ePlug in the valve, set the time of day and backwash schedule, and run a manual backwash and rinse until the drain runs clear before putting the system in service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"pro-tip\"\u003e\n\u003cp\u003e\u003cspan class=\"pro-tip-icon\"\u003e⚠️\u003c\/span\u003e\u003cstrong\u003eBackwash on a schedule, not on demand.\u003c\/strong\u003e Carbon does not need frequent backwashing — every 7 to 14 days is typical on city water, less often on very clean water. Over-backwashing wears media; under-backwashing on turbid water lets the bed pack. If you are on a well with iron or sediment, put a sediment or iron stage ahead of this filter.\u003c\/p\u003e\n\u003c\/div\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\"\u003eWhere This System Fits\u003c\/h2\u003e\n\u003cp\u003eDesigned for whole-house point-of-entry treatment of chlorinated or chloraminated municipal water in homes from 1 to 5+ bathrooms, and as the carbon stage in a multi-stage softener or well-water train. Choose catalytic carbon if your water utility reports chloramine (most of Southern California and many large utilities do) or if you have a rotten-egg sulfur odor; choose activated coconut shell for straight chlorine, taste and odor. This system does not remove hardness, iron, bacteria or dissolved solids — pair it with a softener, iron filter, UV or reverse osmosis as needed. Every variant here is priced identically to the same build in our Build Your System tool, so you can configure there and buy here, or vice versa.\u003c\/p\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\u003eBuilt in California\u003c\/h4\u003e\n\u003cp\u003eAssembled and shipped from our Santa Ana facility. Unassembled ships ground; assembled ships freight on a pallet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e📜\u003c\/div\u003e\n\u003ch4\u003eStock Components\u003c\/h4\u003e\n\u003cp\u003eNSF-listed tank, valve and media — every part is a catalog item we stock and support.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003cdiv class=\"bi-icon\"\u003e📞\u003c\/div\u003e\n\u003ch4\u003eBuild Help\u003c\/h4\u003e\n\u003cp\u003eNot sure which size or carbon you need? Call (877) 541-6603 and we will size it from your water report.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Isopure Water","offers":[{"title":"1.0 Cubic Foot \/ Activated Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560615083,"sku":"CAFB-9-WS1","price":1002.96,"currency_code":"USD","in_stock":true},{"title":"1.0 Cubic Foot \/ Catalytic Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560647851,"sku":"CAF9-CAT-WS1","price":1079.51,"currency_code":"USD","in_stock":true},{"title":"1.5 Cubic Foot \/ Activated Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560680619,"sku":"CAFB-10-WS1","price":1079.7,"currency_code":"USD","in_stock":true},{"title":"1.5 Cubic Foot \/ Catalytic Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560713387,"sku":"CAF10-CAT-WS1","price":1194.52,"currency_code":"USD","in_stock":true},{"title":"2.0 Cubic Foot \/ Activated Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560746155,"sku":"CAFB-12-WS1","price":1167.7,"currency_code":"USD","in_stock":true},{"title":"2.0 Cubic Foot \/ Catalytic Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560778923,"sku":"CAT12-CAT-WS1","price":1320.8,"currency_code":"USD","in_stock":true},{"title":"2.5 Cubic Foot \/ Activated Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560811691,"sku":"CAFB-13-WS1","price":1287.13,"currency_code":"USD","in_stock":true},{"title":"2.5 Cubic Foot \/ Catalytic Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560844459,"sku":"CAF13-CAT-WS1","price":1478.5,"currency_code":"USD","in_stock":true},{"title":"3.0 Cubic Foot \/ Activated Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560877227,"sku":"CAFB-14-WS1","price":1464.34,"currency_code":"USD","in_stock":true},{"title":"3.0 Cubic Foot \/ Catalytic Coconut Shell \/ Unassembled (ships ground)","offer_id":48357560909995,"sku":"CAT14-CAT-WS1","price":1693.99,"currency_code":"USD","in_stock":true},{"title":"1.0 Cubic Foot \/ Activated Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357560942763,"sku":"CAFB-9-WS1-ASM","price":1302.96,"currency_code":"USD","in_stock":true},{"title":"1.0 Cubic Foot \/ Catalytic Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357560975531,"sku":"CAF9-CAT-WS1-ASM","price":1379.51,"currency_code":"USD","in_stock":true},{"title":"1.5 Cubic Foot \/ Activated Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357561008299,"sku":"CAFB-10-WS1-ASM","price":1379.7,"currency_code":"USD","in_stock":true},{"title":"1.5 Cubic Foot \/ Catalytic Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357561041067,"sku":"CAF10-CAT-WS1-ASM","price":1494.52,"currency_code":"USD","in_stock":true},{"title":"2.0 Cubic Foot \/ Activated Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357561073835,"sku":"CAFB-12-WS1-ASM","price":1467.7,"currency_code":"USD","in_stock":true},{"title":"2.0 Cubic Foot \/ Catalytic Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357561106603,"sku":"CAT12-CAT-WS1-ASM","price":1620.8,"currency_code":"USD","in_stock":true},{"title":"2.5 Cubic Foot \/ Activated Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357561139371,"sku":"CAFB-13-WS1-ASM","price":1587.13,"currency_code":"USD","in_stock":true},{"title":"2.5 Cubic Foot \/ Catalytic Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357561172139,"sku":"CAF13-CAT-WS1-ASM","price":1778.5,"currency_code":"USD","in_stock":true},{"title":"3.0 Cubic Foot \/ Activated Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357561204907,"sku":"CAFB-14-WS1-ASM","price":1764.34,"currency_code":"USD","in_stock":true},{"title":"3.0 Cubic Foot \/ Catalytic Coconut Shell \/ Fully Assembled (ships freight)","offer_id":48357561237675,"sku":"CAT14-CAT-WS1-ASM","price":1993.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/nelsen-high-flow-residential-timer-carbon-filter-500148.jpg?v=1759501536","url":"https:\/\/www.isopurewater.com\/products\/ipw-ws1-whole-house-backwashing-carbon-filter","provider":"Isopure Water","version":"1.0","type":"link"}