{"product_id":"pentair-sta-rite-11-black-cartridge-filter-o-ring-for-posi-flo-ii-wc9-3","title":"Pentair Sta-Rite 11\" Black Cartridge Filter O-Ring for Posi-Flo II | WC9-3","description":"\u003ch2\u003ePentair Sta-Rite 11\" Black Cartridge Filter O-Ring for Posi-Flo II | WC9-3\u003c\/h2\u003e\n\u003cp\u003eOEM Pentair Sta-Rite 11\" black cartridge filter O-ring for Posi-Flo II PTM series and PTM135 filters. Helps restore a proper tank seal.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGenuine Pentair Sta-Rite replacement cartridge filter O-ring.\u003c\/li\u003e\n  \u003cli\u003eFits Posi-Flo II PTM50, PTM70, PTM100, and PTM135 series filters.\u003c\/li\u003e\n  \u003cli\u003eBlack O-ring design for tank sealing service.\u003c\/li\u003e\n  \u003cli\u003eAlso referenced for separation tank assembly use.\u003c\/li\u003e\n  \u003cli\u003eDirect OEM replacement for worn, leaking, or flattened original O-rings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe Pentair Sta-Rite WC9-3 cartridge filter O-ring is a model-specific replacement seal for Posi-Flo II cartridge filter systems. It is most consistently tied to PTM50, PTM70, PTM100, and PTM135 filter models. This is not a universal ring. When the original seal is worn out or leaking, replacing it with the correct Pentair Sta-Rite part is the right fix.\u003c\/p\u003e\n\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore reassembly, clean the sealing groove and inspect the tank clamp hardware. A fresh O-ring will not solve sealing problems caused by debris, bad clamp tension, or damaged tank edges.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cp\u003eShut the system down fully and relieve all pressure before opening the filter. Confirm the exact Posi-Flo II model before ordering, seat the O-ring evenly, and avoid twisting or pinching it during reassembly.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":42403639787605,"sku":"WC9-3","price":31.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0105\/0837\/0005\/files\/PENWC93_0.avif?v=1776198422","url":"https:\/\/www.epoolsupply.com\/products\/pentair-sta-rite-11-black-cartridge-filter-o-ring-for-posi-flo-ii-wc9-3","provider":"ePoolSupply","version":"1.0","type":"link"}