{"product_id":"fleck-2900s-downflow-softener-control-valve-w-12-day-time-clock","title":"Fleck 2900S Downflow Softener Control Valve w\/ 12 Day Time Clock","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  .ro-wrap 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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 .stage-body 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 2900S\u003c\/strong\u003e is a high-flow, commercial-grade water softener control valve built on a rugged lead-free brass body and paired here with a \u003cstrong\u003e12-day mechanical time clock\u003c\/strong\u003e for dependable, schedule-based regeneration. Engineered for large residential, commercial, and light-industrial softeners, it drives proven down-flow (co-current) regeneration, mounts to mineral tanks up to 36\" in diameter, and delivers heavy service flows without electronics to fail. This configuration ships complete with a 4C injector, a 1710 plastic brine system with 2.0 GPM refill control, an integral hard-water bypass, and an environmental black cover with a clear programming window.\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 106 GPM\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eContinuous at 15 psi drop (140 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\"\u003e36 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\"\u003e27.5\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eHigh-capacity flow coefficient\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\"\u003eUp to 2\" NPT\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eTop-mount brass body\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eRegeneration\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eDownflow\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003e12-day time-clock, 5-cycle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003ePower\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003e120V \/ 60 Hz\u003c\/div\u003e\n\u003cdiv class=\"sc-note\"\u003eSingle-motor mechanical drive\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 mechanical time clock — regenerates on a fixed calendar, adjustable up to once every 12 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRegeneration Style\u003c\/td\u003e\n\u003ctd\u003eDownflow \/ co-current, 5-cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Body Material\u003c\/td\u003e\n\u003ctd\u003eLead-free brass, NPT connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInjector\u003c\/td\u003e\n\u003ctd\u003e4C injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrine System\u003c\/td\u003e\n\u003ctd\u003e1710 plastic brine valve, 1\/2\" brine line, 2.0 GPM flow control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBypass\u003c\/td\u003e\n\u003ctd\u003eIntegral hard-water 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\u003e1.9\" O.D. pilot, 1-1\/2\" (38 mm) riser tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrain Line Connection\u003c\/td\u003e\n\u003ctd\u003e1\" NPT (Drain Line Flow Control not included — order to match tank size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Pressure\u003c\/td\u003e\n\u003ctd\u003e20 – 125 psi (1.4 – 8.5 bar)\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\u003eCover\u003c\/td\u003e\n\u003ctd\u003eEnvironmental black cover with clear window for at-a-glance timer viewing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eFL2510AIO-TC (NC)\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\"\u003eBuilt for High-Demand Softening\u003c\/h2\u003e\n\u003cdiv class=\"ro-feature-grid\"\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eHeavy-Duty Brass Body\u003c\/h3\u003e\n\u003cp\u003eA lead-free brass valve body stands up to high pressure, temperature swings, and years of continuous duty far better than plastic-bodied residential valves — the reason the 2900S is a workhorse in 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\u003eA simple, rugged mechanical timer regenerates the softener on a set calendar schedule with no circuit boards to fail — ideal where water use is predictable and long-term reliability matters most.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003e4C Injector\u003c\/h3\u003e\n\u003cp\u003eThe pre-matched 4C injector draws brine efficiently through the resin bed during regeneration, sizing the eductor to the valve's high flow so the resin recharges thoroughly on every cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003e1710 Brine System, 2.0 GPM\u003c\/h3\u003e\n\u003cp\u003eAn external 1710 plastic brine valve with a 2.0 GPM refill control meters the brine draw and tank fill precisely, and services from the outside without pulling the valve off the tank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eHard-Water Bypass\u003c\/h3\u003e\n\u003cp\u003eAn integral bypass keeps untreated water flowing to the building during the regeneration cycle, so supply is never interrupted even on a single-tank system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eEnvironmental Cover\u003c\/h3\u003e\n\u003cp\u003eThe sealed black environmental cover protects the drive and timer from dust and moisture, while a clear window lets you confirm the program at a glance without opening the unit.\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\u003eThread the 2900S onto your mineral tank over the 1-1\/2\" 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 brass ports, then run the 1\" drain line and the brine line to the 1710 brine system, keeping the drain within the recommended length and rise.\u003c\/li\u003e\n\u003cli\u003ePlug into 120V power and program the 12-day time clock: set the current time, the time of day to regenerate, and the number of days between regenerations based on your hardness and water usage.\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 2900S Fits\u003c\/h2\u003e\n\u003cp\u003eThe 2900S softener valve is designed for mineral tanks from roughly 14\" to 36\" in diameter, making it a natural fit for large homes, apartment and commercial buildings, restaurants, car washes, and light-industrial process water. Because this is a time-clock (calendar) control rather than a metered valve, regeneration is triggered by elapsed days rather than gallons used — so it's best where daily demand is steady and predictable. Size your day setting to your water hardness and total usage: aim to regenerate before the resin bed reaches about 75% of its rated capacity so you never let hardness break through, but not so often that you waste salt and water. This unit ships \u003cstrong\u003eLess Drain Line Flow Control\u003c\/strong\u003e, so be sure to add the DLFC button matched to your tank size, and confirm your incoming pressure and temperature fall within the valve's 20–125 psi and 34–110°F ranges.\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 2900S brine system and injector service from the outside of the valve, so you can clean or swap the 4C injector, brine valve, and flow controls without breaking any plumbing connections — a big time-saver during routine maintenance or if you ever need to re-size the valve for a different flow.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Fleck","offers":[{"title":"Default Title","offer_id":47591792607403,"sku":"290001-001 (NC)","price":2831.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/fl29-17-4c-00.jpg?v=1786334896","url":"https:\/\/www.isopurewater.com\/products\/fleck-2900s-downflow-softener-control-valve-w-12-day-time-clock","provider":"Isopure Water","version":"1.0","type":"link"}