{"product_id":"drain-cap-o-ring","title":"Sta-Rite Drain Cap O-Ring for Cristal-Flo Filter","description":"\u003cp\u003eThe Sta-Rite U9-371 is the drain cap o-ring for the Cristal-Flo filter. It is the seal that sits behind the drain cap at the base of the tank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe part behind a leaking drain\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFilter drains leak more often than any other point on the tank, and the o-ring is almost always the reason. Rubber that has flattened, hardened or split will not seal no matter how hard the cap is turned, and over tightening a cap to chase the drip is how caps get cracked.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitting it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eWipe the groove clean, give the new o-ring a light coat of silicone lubricant made for pool equipment, and hand tighten the cap. Keep petroleum grease away from it, because it swells and breaks down o-ring rubber. It is a part worth replacing on sight any time the filter is opened up.\u003c\/p\u003e","brand":"Sta-Rite","offers":[{"title":"Default Title","offer_id":48634044547284,"sku":"STA-051-7933","price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_8427dff5-da58-4847-84ab-2e17ec93c50c.jpg?v=1788825229","url":"https:\/\/www.activepoolsupply.com\/products\/drain-cap-o-ring","provider":"Active Pool Supply","version":"1.0","type":"link"}