{"product_id":"hayward-c4000-air-relief-tube-cx4000z3","title":"Hayward Air Relief Tube for Star-Clear Plus C4000 Series Cartridge Filters | CX4000Z3","description":"\u003cp\u003eThe Hayward Air Relief Tube (CX4000Z3) is the OEM replacement air relief tube for Hayward Star-Clear Plus C4000 series cartridge filters.\u003c\/p\u003e\n\n\u003cp\u003eThe air relief tube vents trapped air from the filter tank, allowing the filter to prime correctly and maintain accurate pressure gauge readings. A damaged or cracked tube can cause air lock, erratic pressure readings, or water bypass — replacing it restores proper filter operation.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eHayward Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eCX4000Z3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eUPC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e610377005432\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eChannel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePoolaroo Pro Tip\u003c\/h3\u003e\n\u003cp\u003eWhen replacing the air relief tube, inspect the manual air relief valve assembly and its O-ring at the same time. If the O-ring is worn or flattened, it is a common source of air leaks that can mimic a faulty tube. Always shut off the pump and relieve filter pressure before disassembling any part of the filter tank.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-06-22 --\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":51774210212115,"sku":"CX4000Z3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/hayward-air-relief-tube-for-star-clear-plus-c4000-series-cartridge-filters-cx4000z3-1.webp?v=1789640208","url":"https:\/\/poolaroo.com\/products\/hayward-c4000-air-relief-tube-cx4000z3","provider":"Poolaroo","version":"1.0","type":"link"}