{"product_id":"fleck-2510-1650-timever-valve-less-dlfc-cover-251001-002","title":"Fleck 2510\/1650 Downflow Softener Timer Valve, Less DLFC \u0026 Cover (251001-002)","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 0;}\n  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.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 .spec-cards{grid-template-columns:1fr;}\n  }\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 .ro-feature-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 .sc-label { font-size: 14px !important; }\n  .ro-wrap .ro-title { font-size: 24px !important; }\n\u003c\/style\u003e\n\u003cdiv class=\"ro-wrap\"\u003e\n\n\u003cdiv class=\"ro-callout\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eFleck 2510\u003c\/strong\u003e is a proven, mid-size downflow softener control valve that has been a workhorse in residential and light-commercial systems for decades. This configuration runs a rugged \u003cstrong\u003e12-day mechanical time clock\u003c\/strong\u003e — an electromechanical drive with heavy-duty plastic gears and a single hydraulically-balanced piston — for dependable, schedule-based regeneration with no circuit boards to fail. Built on a non-corrosive, UV-resistant fiber-reinforced polymer body, it flows up to 19 GPM and fits softener tanks up to 16\" in diameter. It ships with a 120V U.S. power cord, hardwater bypass, 1650 brine valve, #1 injector, 0.50 GPM brine flow control, and an environmental backplate — \u003cstrong\u003eLess Cover and Less Drain Line Flow Control (DLFC)\u003c\/strong\u003e, so you can add the exact drain button and cover your build needs.\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\"\u003eService Flow\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eUp to 19 GPM\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eContinuous at 15 psi drop (24 GPM peak)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eBackwash Flow\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e17 GPM\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eAt 25 psi drop\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eValve Cv\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e4.8\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eFlow coefficient at 1 psi drop\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\"\u003e12-Day Time Clock\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eMechanical, adjustable 3- or 5-cycle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eConfiguration\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eDownflow Softener\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eLess DLFC \u0026amp; Less Cover\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003ePort Size\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e3\/4\" – 1-1\/4\"\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eNPT, BSP \u0026amp; sweat options\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\"\u003eValve Construction \u0026amp; Configuration\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Type\u003c\/td\u003e\n\u003ctd\u003e12-day electromechanical time clock — rugged design with heavy-duty 3\/8\" wide plastic gears; regenerates on a fixed calendar schedule\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRegeneration\u003c\/td\u003e\n\u003ctd\u003eDownflow \/ co-current, fully adjustable 3- or 5-cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Body Material\u003c\/td\u003e\n\u003ctd\u003eNon-corrosive, UV-resistant fiber-reinforced polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiston\u003c\/td\u003e\n\u003ctd\u003eSingle, time-tested hydraulically-balanced piston\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector\u003c\/td\u003e\n\u003ctd\u003e#1 injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrine System\u003c\/td\u003e\n\u003ctd\u003e1650 brine valve, 3\/8\" brine line, 0.50 GPM brine flow control (BLFC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBypass\u003c\/td\u003e\n\u003ctd\u003eIntegral hardwater bypass (raw water available during regeneration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistributor \/ Riser Tube\u003c\/td\u003e\n\u003ctd\u003e1.05\" O.D. pilot, 3\/4\" riser tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Base\u003c\/td\u003e\n\u003ctd\u003e2-1\/2\" – 8 NPSM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrain Line Connection\u003c\/td\u003e\n\u003ctd\u003e1\/2\" NPTF (Drain Line Flow Control not included — order to match tank size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e120V \/ 60 Hz, U.S. power cord\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Pressure\u003c\/td\u003e\n\u003ctd\u003e20 – 125 psi (300 psi hydrostatic rated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Temperature\u003c\/td\u003e\n\u003ctd\u003e34 – 110°F (1 – 43°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Tank Diameter\u003c\/td\u003e\n\u003ctd\u003eUp to 16\" (softener and filter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCover\u003c\/td\u003e\n\u003ctd\u003eNot included — ships with environmental backplate only (Less Cover)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e251001-002\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 the 2510 Endures\u003c\/h2\u003e\n\u003cdiv class=\"ro-feature-grid\"\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eProven Mechanical Reliability\u003c\/h3\u003e\n\u003cp\u003eA simple electromechanical timer with heavy-duty plastic gears and one hydraulically-balanced piston means fewer things to fail and a valve that keeps running for years.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eCorrosion-Free Body\u003c\/h3\u003e\n\u003cp\u003eThe fiber-reinforced polymer body resists corrosion and UV, holding up to continuous service in residential and light-commercial installs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003e12-Day Time Clock\u003c\/h3\u003e\n\u003cp\u003eRegenerates on a set calendar schedule with no electronics — ideal where water use is steady and predictable and low-maintenance operation matters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eAdjustable 3- or 5-Cycle\u003c\/h3\u003e\n\u003cp\u003eFully adjustable cycle programming lets you tune backwash, brine draw, and rinse to your resin and water conditions for efficient regeneration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eHardwater Bypass\u003c\/h3\u003e\n\u003cp\u003eAn integral bypass keeps water flowing to the building during regeneration, so supply is never interrupted on a single-tank system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eBuild-It-Your-Way\u003c\/h3\u003e\n\u003cp\u003eShips Less DLFC and Less Cover so you can match the drain flow control to your exact tank size and add the cover that suits your installation.\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\u003eMount the 2510 onto your mineral tank over the 3\/4\" distributor\/riser tube, making sure the riser is cut flush, chamfered, and centered so it seats cleanly in the valve.\u003c\/li\u003e\n\u003cli\u003eSelect and install the correct Drain Line Flow Control button for your tank diameter (sold separately) — this sets the backwash rate that lifts and cleans the resin bed.\u003c\/li\u003e\n\u003cli\u003eConnect the inlet and outlet plumbing to the 3\/4\"–1-1\/4\" ports, run the 1\/2\" drain line, and connect the 3\/8\" brine line to the 1650 brine system.\u003c\/li\u003e\n\u003cli\u003ePlug into 120V power and program the 12-day time clock: set the current time, the regeneration time, and the days between regenerations based on your hardness and water usage. Add an environmental cover if the valve will be exposed (Less Cover).\u003c\/li\u003e\n\u003c\/ol\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 the 2510 Fits\u003c\/h2\u003e\n\u003cp\u003eThe 2510 suits softener (and filter) tanks up to 16\" in diameter, making it a versatile mid-size valve for larger homes and light-commercial softeners. As a time-clock control it regenerates on elapsed days rather than metered gallons, so it's best where demand is steady and predictable — size the day interval to your water hardness and usage so you regenerate before the resin bed is exhausted without wasting salt and water. This unit ships \u003cstrong\u003eLess DLFC and Less Cover\u003c\/strong\u003e, so add the drain button matched to your tank and the cover of your choice, and confirm your incoming supply falls within the valve's 20–125 psi and 34–110°F ranges before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"pro-tip\"\u003e\n\u003cp\u003e\u003cspan class=\"pro-tip-icon\"\u003e💧\u003c\/span\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e The 2510's electromechanical timer and single hydraulically-balanced piston are famously serviceable — seal kits and parts are widely available, so this valve can be rebuilt rather than replaced and run for many years. Since it ships Less Cover, remember to add an environmental cover if the valve will sit anywhere exposed to dust or moisture.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Fleck","offers":[{"title":"Default Title","offer_id":47592642314411,"sku":"251001-002 (NC)","price":736.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/fl2510-16_00.jpg?v=1786340964","url":"https:\/\/www.isopurewater.com\/products\/fleck-2510-1650-timever-valve-less-dlfc-cover-251001-002","provider":"Isopure Water","version":"1.0","type":"link"}