{"product_id":"diffuser-o-ring-2","title":"Sta-Rite Diffuser O-Ring for PLBC Booster Pump","description":"\u003cp\u003eThe Sta-Rite U9-199 is the diffuser o-ring for the PLBC booster pump, model PLBC-178L. It is the genuine Sta-Rite replacement for that position.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it seals\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA booster pump exists to give a pressure side cleaner more head than the filter pump can supply. The impeller does that work, and the diffuser directs the flow it produces. The o-ring between the diffuser and the housing is what stops pressurized water from circling back inside the pump. When it hardens or takes a set, the pump still runs and still sounds normal, but the cleaner gets less pressure than it should and starts to crawl.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitting\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe diffuser is exposed as soon as the pump is opened, so this o-ring is worth changing during any PLBC service, particularly a shaft seal replacement. Seat it clean and dry into its groove and check the diffuser for cracks before you put the pump back together.\u003c\/p\u003e","brand":"Sta-Rite","offers":[{"title":"Default Title","offer_id":48635042988244,"sku":"STA-101-6226","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_94c0bff4-739e-4083-9984-e486e49a1129.jpg?v=1788840543","url":"https:\/\/www.activepoolsupply.com\/products\/diffuser-o-ring-2","provider":"Active Pool Supply","version":"1.0","type":"link"}