{"product_id":"pentair-181011-clamp-assembly-ns-pf35-with-spring","title":"Pentair 181011 Clamp Assembly - NS\/PF35 with Spring","description":"\u003cdiv style=\"font-family: Arial, Helvetica, sans-serif; color: #1f2937; line-height: 1.65;\"\u003e\n\u003cdiv style=\"background: #fff3e8; border: 1px solid #f97316; border-radius: 10px; padding: 16px 18px; margin-bottom: 18px;\"\u003e\n\u003cstrong style=\"color: #c2410c; font-size: 16px;\"\u003eDiscontinued Product Notice\u003c\/strong\u003e\u003cbr\u003eThe Pentair 181011 Clamp Assembly has been discontinued by the manufacturer and is no longer available for purchase. This listing is retained for product identification, compatibility reference, and replacement guidance only.\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003ePentair 181011 Clamp Assembly\u003c\/strong\u003e was an 18-inch spring-style tank clamp used on select legacy Pentair, Pac-Fab, and Nautilus NS\/PF35 D.E. filter systems. The assembly secured the upper and lower tank sections together to maintain a proper pressure seal during filter operation.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0;\"\u003e\n\u003cspan style=\"background: #e8f4fb; color: #075985; border-radius: 999px; padding: 6px 11px; font-size: 13px; font-weight: bold;\"\u003eLegacy Filter Part\u003c\/span\u003e \u003cspan style=\"background: #fff3e8; color: #c2410c; border-radius: 999px; padding: 6px 11px; font-size: 13px; font-weight: bold;\"\u003eDiscontinued\u003c\/span\u003e \u003cspan style=\"background: #ecfdf5; color: #047857; border-radius: 999px; padding: 6px 11px; font-size: 13px; font-weight: bold;\"\u003e18\" Clamp Assembly\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdetails style=\"border-top: 1px solid #d1d5db; padding: 14px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-size: 17px; font-weight: bold; color: #111827;\"\u003eOverview\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px;\"\u003e\n\u003cp\u003ePentair part number \u003cstrong\u003e181011\u003c\/strong\u003e was designed for older Pentair\/Pac-Fab Nautilus NS and PF35 filter applications, including certain filters manufactured prior to 1991. Its spring-loaded clamp design helped simplify installation while applying even pressure around the tank seam.\u003c\/p\u003e\n\u003cp\u003eA worn, bent, corroded, or improperly tightened tank clamp can create a serious safety concern. Never operate a pressurized pool filter with a damaged clamp, missing hardware, weakened springs, or cracked tank flange.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-top: 1px solid #d1d5db; padding: 14px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-size: 17px; font-weight: bold; color: #111827;\"\u003eOriginal Part Details\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Pentair \/ Pac-Fab\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOriginal Part Number:\u003c\/strong\u003e 181011\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Spring-style tank clamp assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamp Size:\u003c\/strong\u003e Approximately 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOriginal Application:\u003c\/strong\u003e Select Nautilus NS and PF35 D.E. filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOriginal Hardware Included:\u003c\/strong\u003e Clamp halves, springs, nuts, and washers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus:\u003c\/strong\u003e Discontinued and no longer available from Pentair\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-top: 1px solid #d1d5db; padding: 14px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-size: 17px; font-weight: bold; color: #111827;\"\u003eCompatibility\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px;\"\u003e\n\u003cp\u003eThis clamp assembly was commonly associated with legacy Pentair\/Pac-Fab Nautilus NS filter systems and PF35 filter configurations. It may be referenced on older NS24, NS36, NS48, NS60, and NS72 filter systems depending on the exact tank generation and clamp configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Do not select a replacement clamp based on diameter alone. Tank flange profile, clamp width, hardware location, spring configuration, and the filter’s manufacturing generation must all match. A clamp that appears visually similar may not safely fit your filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-top: 1px solid #d1d5db; padding: 14px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-size: 17px; font-weight: bold; color: #111827;\"\u003eReplacement Guidance\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px;\"\u003e\n\u003cp\u003eBecause the complete Pentair 181011 clamp assembly is discontinued, replacement should be approached as a safety-critical repair rather than a generic hardware substitution.\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 20px;\"\u003e\n\u003cli\u003eInspect the tank halves and sealing flange for cracks, warping, or damage.\u003c\/li\u003e\n\u003cli\u003eConfirm whether the original clamp band itself is reusable and whether only the spring\/hardware components need replacement.\u003c\/li\u003e\n\u003cli\u003eFor certain older stainless-clamp Nautilus filters, individual clamp hardware may be serviceable with the correct matching bolt, nut, spring, and washer configuration.\u003c\/li\u003e\n\u003cli\u003eIf the clamp band, tank flange, or tank body is damaged, a complete compatible filter replacement may be the safest path.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003eContact Aqua Terra Backyard with your filter model, serial number, tank diameter, and photos of the existing clamp and tank seam for help identifying the most practical replacement path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-top: 1px solid #d1d5db; padding: 14px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-size: 17px; font-weight: bold; color: #111827;\"\u003eInstallation \u0026amp; Safety Notes\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 20px;\"\u003e\n\u003cli\u003eTurn off the pump and fully relieve all filter pressure before servicing.\u003c\/li\u003e\n\u003cli\u003eOpen the filter air-relief valve before removing any clamp hardware.\u003c\/li\u003e\n\u003cli\u003eInspect the tank O-ring and sealing surfaces during every clamp service.\u003c\/li\u003e\n\u003cli\u003eUse only hardware designed for the specific filter and clamp configuration.\u003c\/li\u003e\n\u003cli\u003eDo not overtighten clamp hardware or use damaged springs, bent bands, or mismatched fasteners.\u003c\/li\u003e\n\u003cli\u003eAfter reassembly, stand clear of the filter while restarting the pump and inspect carefully for leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-top: 1px solid #d1d5db; border-bottom: 1px solid #d1d5db; padding: 14px 0;\"\u003e\n\u003csummary style=\"cursor: pointer; font-size: 17px; font-weight: bold; color: #111827;\"\u003eFrequently Asked Questions\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eIs Pentair 181011 still available?\u003c\/strong\u003e\u003cbr\u003eNo. Pentair 181011 has been discontinued and is no longer available as a current OEM replacement part.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use a universal filter clamp instead?\u003c\/strong\u003e\u003cbr\u003eNot recommended. Filter tank clamps are safety-critical components and must match the exact tank design, flange profile, hardware arrangement, and filter generation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I replace only the springs or hardware?\u003c\/strong\u003e\u003cbr\u003ePotentially, but only when the existing clamp band and tank flange are structurally sound and the replacement hardware matches the original clamp design exactly.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003cstrong\u003eWhat information do I need to identify a solution?\u003c\/strong\u003e\u003cbr\u003eSend photos of the entire filter, the clamp seam, the existing clamp hardware, the filter label, and the tank diameter. This helps confirm whether a hardware rebuild or a larger replacement path is appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdiv style=\"background: #eff6ff; border-left: 4px solid #0284c7; border-radius: 6px; padding: 15px 16px; margin-top: 20px;\"\u003e\n\u003cstrong\u003eNeed Help With a Legacy Pentair Filter?\u003c\/strong\u003e\u003cbr\u003eAqua Terra Backyard can help review your filter photos and determine whether your existing clamp can be safely rebuilt or whether a compatible upgrade path is needed.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52078618509586,"sku":"181011","price":298.85,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/PEN181011_0.jpg?v=1772563166","url":"https:\/\/www.aquaterrabackyard.com\/products\/pentair-181011-clamp-assembly-ns-pf35-with-spring","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}