{"product_id":"clack-ws2-drive-cap-assembly-v3728","title":"Clack WS2 Drive Cap Assembly (V3728)","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\u003cstyle\u003e.ro-wrap{--deep:#0a1628;--ocean:#0f3460;--sky:#2196f3;--aqua:#4dd0e1;--white:#fff;--offwhite:#f2f7fc;--slate:#dce8f5;--text:#0d1f38;--muted:#4a6280;--radius:12px;font-family:'DM Sans',sans-serif;color:var(--text);line-height:1.6;overflow-wrap:break-word;min-width:0}.ro-wrap .ro-hero{background:linear-gradient(135deg,var(--deep) 0%,var(--ocean) 50%,#1a5276 100%);color:var(--white);padding:52px 40px 44px;border-radius:var(--radius) var(--radius) 0 0}.ro-wrap .ro-eyebrow{font-size:14px !important;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--aqua);margin-bottom:12px}.ro-wrap .ro-hero h2{font-family:'DM Serif Display',serif;font-size:clamp(26px,4vw,40px) 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.ro-feature-card{background:var(--offwhite);border:1px solid var(--slate);border-radius:var(--radius);padding:20px 18px}.ro-wrap .ro-feature-card h3{font-size:20px !important;font-weight:600;color:var(--deep);margin-bottom:6px}.ro-wrap .ro-feature-card p{color:var(--muted);margin:0}.ro-wrap .install-steps{list-style:none;counter-reset:step;padding:0;margin:4px 0 0;display:flex;flex-direction:column;gap:14px}.ro-wrap .install-steps li{counter-increment:step;display:flex;align-items:flex-start;gap:14px}.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:#fff;font-size:15px !important;font-weight:700;flex-shrink:0}.ro-wrap .pro-tip{display:block;background:#fffbeb;border:1px solid #f5d87a;border-radius:var(--radius);padding:18px 20px;margin-top:20px}.ro-wrap .pro-tip p{color:#5a4500;margin:0}.ro-wrap .benefits-strip{display:flex;flex-wrap:wrap;background:var(--deep);color:var(--white);border-radius:0 0 var(--radius) var(--radius);overflow:hidden}.ro-wrap .benefit-item{flex:1 1 200px;padding:24px 22px;border-right:1px solid rgba(255,255,255,.1)}.ro-wrap .benefit-item h4{font-size:15px !important;font-weight:600;color:var(--aqua);margin-bottom:5px;text-transform:uppercase;letter-spacing:.05em}.ro-wrap .benefit-item p{font-size:15px !important;color:rgba(255,255,255,.65);margin:0}.ro-wrap p,.ro-wrap li,.ro-wrap td{font-size:18px !important;line-height:1.6 !important}@media(max-width:640px){.ro-wrap .ro-hero{padding:36px 24px 32px}.ro-wrap .ro-section{padding:28px 20px}.ro-wrap .benefits-strip{flex-direction:column}.ro-wrap .benefit-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.1)}}\u003c\/style\u003e\u003cdiv class=\"ro-wrap\"\u003e\n\u003cdiv class=\"ro-hero\"\u003e\n\u003cdiv class=\"ro-eyebrow\"\u003eClack Corporation · Genuine OEM\u003c\/div\u003e\n\u003ch2\u003eWS2 Drive Cap \u003cem\u003eAssembly\u003c\/em\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"ro-tagline\"\u003eCouples the WS2 drive train to the piston, moving it precisely through every service and regeneration position.\u003c\/div\u003e\n\u003cdiv class=\"ro-badges\"\u003e\n\u003cspan class=\"ro-badge\"\u003ePart # V3728\u003c\/span\u003e\u003cspan class=\"ro-badge\"\u003eClack WS2 (2\")\u003c\/span\u003e\u003cspan class=\"ro-badge\"\u003eGenuine Clack\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-callout\"\u003e\u003cp\u003eThe \u003cstrong\u003eClack V3728\u003c\/strong\u003e drive cap assembly sits at the top of the WS2 valve body. It carries the gearing that the piston rod attaches to, turning the motor's rotation into the straight-line piston travel that steps the valve through service, backwash, brine draw, rinse and refill. A cracked cap or stripped gear leaves the piston stuck between positions — replacing the full assembly gets the valve cycling correctly again.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eAt a Glance\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eKey Specs\u003c\/h3\u003e\n\u003cdiv class=\"spec-cards\"\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003ePart Number\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eV3728\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eFits Valve\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eClack WS2\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\"\u003e2\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"sc-label\"\u003eType\u003c\/div\u003e\n\u003cdiv class=\"sc-value\"\u003eOEM Assembly\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\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\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eClack Corporation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part #\u003c\/td\u003e\n\u003ctd\u003eV3728\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription\u003c\/td\u003e\n\u003ctd\u003eWS2 drive cap assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Valve\u003c\/td\u003e\n\u003ctd\u003eClack WS2 series 2\" control valves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eDrives the piston between valve cycle positions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew, genuine Clack part\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eWhy Replace It\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eSigns of a Failed Drive Cap\u003c\/h3\u003e\n\u003cdiv class=\"ro-feature-grid\"\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eStuck Regeneration\u003c\/h3\u003e\n\u003cp\u003eThe valve hums or shows an error but never reaches the next cycle position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eGrinding or Clicking\u003c\/h3\u003e\n\u003cp\u003eStripped or broken gear teeth slip under load instead of moving the piston.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-feature-card\"\u003e\n\u003ch3\u003eLeak at the Cap\u003c\/h3\u003e\n\u003cp\u003eA cracked cap or failed seal lets water weep out around the top of the valve body.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eInstallation\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eReplacement Overview\u003c\/h3\u003e\n\u003col class=\"install-steps\"\u003e\n\u003cli\u003ePut the valve in bypass, unplug power, and relieve pressure by opening a downstream faucet.\u003c\/li\u003e\n\u003cli\u003eRemove the valve cover and the drive bracket and motor assembly to expose the drive cap.\u003c\/li\u003e\n\u003cli\u003eUnscrew the drive cap assembly and lift it out together with the piston.\u003c\/li\u003e\n\u003cli\u003eTransfer the piston to the new V3728 cap, lubricate the cap O-ring with NSF-approved silicone grease, and thread it back into the valve body.\u003c\/li\u003e\n\u003cli\u003eReinstall the drive bracket, motor and cover, restore power, and run a manual regeneration to confirm the valve steps through every cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"pro-tip\"\u003e\u003cp\u003e\u003cstrong\u003e🔧 Pro Tip:\u003c\/strong\u003e With the cap off, the piston and seal stack are fully exposed — it's the ideal time to inspect them. We stock the matching WS2 seal \u0026amp; spacer stack (V3729), downflow piston (V3725) and brine piston (V3726).\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ro-section\"\u003e\n\u003cdiv class=\"ro-label\"\u003eCompatibility\u003c\/div\u003e\n\u003ch3 class=\"ro-title\"\u003eWill It Fit My Valve?\u003c\/h3\u003e\n\u003cp\u003eThe V3728 is built for Clack WS2 series 2\" control valves. It does not fit Clack WS1, WS1.25 or WS1.5 valves, which use a different drive cap. Check the model on your valve's label before ordering, or call us and we'll confirm the right part.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefits-strip\"\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003ch4\u003eShips from California\u003c\/h4\u003e\n\u003cp\u003eFast dispatch from our Santa Ana, CA warehouse.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003ch4\u003eGenuine Clack\u003c\/h4\u003e\n\u003cp\u003eFactory OEM part, not an aftermarket copy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"benefit-item\"\u003e\n\u003ch4\u003eBuild Help\u003c\/h4\u003e\n\u003cp\u003eQuestions on your valve? Call (877) 541-6603.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Clack","offers":[{"title":"Default Title","offer_id":48217943867563,"sku":"V3728","price":82.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7677\/6098\/files\/V3728-2.jpg?v=1791643274","url":"https:\/\/www.isopurewater.com\/products\/clack-ws2-drive-cap-assembly-v3728","provider":"Isopure Water","version":"1.0","type":"link"}