{"product_id":"air-relief-tube-2","title":"Hayward Air Relief Tube for SwimClear and Super Star Clear Filters, CX4000Z3","description":"\u003cp\u003eThe Hayward CX4000Z3 is the air relief tube assembly used in the SwimClear and Super Star Clear cartridge filters. It is the genuine Hayward part and arrives as a complete assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAir collects at the top of a filter tank every time the system is opened or loses prime. The relief tube gives that air a route from the highest point in the tank to the relief valve on the lid, so opening the valve actually purges it. Without the tube, the valve only bleeds what happens to be right beneath it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy it matters\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA pocket of trapped air takes up space that water should be occupying, which cuts the working area of the cartridges and makes the pressure gauge tell you something other than the truth about cartridge condition. That leads to filters getting cleaned or cartridges being replaced when the real problem was air.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore you order\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCheck the model stamped on your tank. Our source data lists the largest SwimClear this fits inconsistently, as both C5520 and C7000, so confirm your model rather than assuming the coverage.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48633978224852,"sku":"HAY-051-8253","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_36ce7194-dad6-4404-8865-752e57c97377.jpg?v=1788823186","url":"https:\/\/www.activepoolsupply.com\/products\/air-relief-tube-2","provider":"Active Pool Supply","version":"1.0","type":"link"}