{"product_id":"o-ring-13","title":"Astral Filter O-Ring","description":"\u003cp\u003eThis is the Astral replacement filter o-ring, part 721R1820060, with a 7.5 inch inside diameter. It seals the filter housing on the models it is listed for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it goes\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAstral lists it for the Persius 1800 series top mount sand filter and for the Cantabric sand 3000 series in both top mount and side mount configurations. Before ordering, measure the ring you are pulling out across the inside opening and compare it to the 7.5 inch figure, since filter o-rings that look alike often are not.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitting it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eClean the groove and the sealing face before the new ring goes in, and use a silicone based o-ring lubricant. That helps the ring seat evenly instead of rolling as the housing closes, and it keeps the ring from bonding to the housing so the next service is straightforward.\u003c\/p\u003e","brand":"Astral","offers":[{"title":"Default Title","offer_id":48634915127508,"sku":"ASP-061-505","price":12.11,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_80931c96-41b7-4bb1-ab9c-1ac5b1196ed1.jpg?v=1788838807","url":"https:\/\/www.activepoolsupply.com\/products\/o-ring-13","provider":"Active Pool Supply","version":"1.0","type":"link"}