{"product_id":"check-valve","title":"Pentair 1\/2\" Check Valve, Rainbow Automatic Feeder 320","description":"\u003cp\u003eThe Pentair R172248Z is the 1\/2 in. check valve for the Rainbow automatic chlorine feeder, Model 320. It is the genuine Pentair Rainbow part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy a chlorinator needs a check valve\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe water inside a tab feeder is far more aggressive than pool water. The check valve makes sure that water can only move one way, out toward the pool, and never back up the line toward the heater and the rest of the equipment. When the valve stops sealing, the damage tends to show up on the expensive parts upstream long before anyone suspects the feeder.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTreat it as a wear part\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eConstant exposure to concentrated chlorine breaks down seats and weakens springs. Replacing the check valve during a routine feeder service is cheap next to what a backflow can cost.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48625721606356,"sku":"RAI-451-4033","price":15.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_f0a1a13d-ae1e-4005-9c42-c308fed0ff8f.jpg?v=1788689922","url":"https:\/\/www.activepoolsupply.com\/products\/check-valve","provider":"Active Pool Supply","version":"1.0","type":"link"}