{"product_id":"air-bleed-tube-assembly-520-sqft","title":"Pentair Genuine OEM Air Bleed Tube Assembly 520 SQFT","description":"\u003cp\u003eThe Pentair 178583 is the genuine air bleed tube assembly for the Clean and Clear 520 cartridge filter and the Quad D.E. 100. It is the current version of the part and replaces all of the earlier air bleed assemblies used on those filters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSuperseded design\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe version this replaces had a white cap that looked very similar to the pipe it was attached to, and it is no longer produced. If that is what is on your filter, this assembly is the correct replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEvery time the pump starts, air collects at the top of the filter tank. The bleed assembly gives that air a path out so the tank fills with water. Trapped air keeps part of the element dry, drops effective filter area, and can make the tank pressure readings misleading. A cracked or blocked bleed tube is worth changing rather than working around.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48634472136916,"sku":"PAC-051-1688","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_7bf94f0a-d120-4f06-a75e-773b1b2e4fd0.jpg?v=1788831768","url":"https:\/\/www.activepoolsupply.com\/products\/air-bleed-tube-assembly-520-sqft","provider":"Active Pool Supply","version":"1.0","type":"link"}