{"product_id":"o-ring-1","title":"Sta-Rite Black Tank O-Ring for Posi-Flo II PTM Cartridge Filters, WC9-3","description":"\u003cp\u003eThe Sta-Rite WC9-3 is the black tank o-ring for the Posi-Flo II cartridge filter in the PTM series and the PTM 135 series, and for the separation tank assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it seals\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is the o-ring at the tank joint, the one that has to hold once the pump comes up to pressure. It lives in a groove, it takes a set from being compressed for years, and it dries out and nicks in service. A leak that starts right after a cartridge clean is almost always this ring going back in tired.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitting it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eClean the groove out completely before the new ring goes in, and use a silicone based lubricant made for pool o-rings. Petroleum grease will soften and swell the rubber, and the ring that was going to last several seasons will not.\u003c\/p\u003e","brand":"Sta-Rite","offers":[{"title":"Default Title","offer_id":48626284789972,"sku":"STA-051-3783","price":39.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_a19d5a20-3c40-4ab6-889b-d2a3d70b7150.jpg?v=1788707638","url":"https:\/\/www.activepoolsupply.com\/products\/o-ring-1","provider":"Active Pool Supply","version":"1.0","type":"link"}