{"product_id":"piston-assembly-o-ring","title":"Pentair Piston Assembly O-Ring","description":"\u003cp\u003eThe Pentair 35505-1318 is the piston assembly O-ring for the Sta-Rite WC212-134 push pull valve. It has a 2-1\/2 inch inside diameter and may also fit other Sta-Rite valves.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it fixes\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA push pull valve seals by sliding a piston through a bore, and it is the O-rings on that piston that make the seal. When one hardens, flattens or picks up a nick, water bypasses the piston, and the symptom is a valve that no longer isolates properly in one or both positions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitting it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMeasure the inside diameter of the old ring against the 2-1\/2 inch figure to confirm the match. A silicone based O-ring lubricant on assembly helps the ring seat cleanly and stops it tearing as the piston goes home.\u003c\/p\u003e","brand":"Sta-Rite","offers":[{"title":"Default Title","offer_id":48627752796372,"sku":"SWQ-061-3959","price":15.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_1b54f6b1-204c-4b76-a576-0b92a0faf303.jpg?v=1788727730","url":"https:\/\/www.activepoolsupply.com\/products\/piston-assembly-o-ring","provider":"Active Pool Supply","version":"1.0","type":"link"}