{"product_id":"manual-air-relief-cap","title":"Hayward Manual Air Relief Cap","description":"\u003cp\u003eThe Hayward SX200G is the manual air relief cap, also listed as the air relief knob, for Hayward side mount sand filters. It is the knob you open to bleed trapped air out of the filter tank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy you bleed the filter\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAir collects at the top of the tank whenever the pump has been opened, primed or run dry. Trapped air cuts flow and can make the tank knock. Opening the relief cap with the pump running lets the air out until water comes through, and then it is closed again.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOrder the o-ring with it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe sealing o-ring is not included and has to be bought separately. If the cap has been weeping, the o-ring is almost always flat or cracked too, so it is worth having both in hand before you start.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe cap covers the Hayward S-200 and S-240 sand filters along with the Pro Series and Pro Series Plus side mount range.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48625813520596,"sku":"HAY-051-2190","price":17.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_0a29cd31-9c78-4ca1-a472-590e91d09915.png?v=1788700457","url":"https:\/\/www.activepoolsupply.com\/products\/manual-air-relief-cap","provider":"Active Pool Supply","version":"1.0","type":"link"}