{"product_id":"star-clear-plus-knob-washer","title":"Hayward Star-Clear Plus Knob Washer","description":"\u003cp\u003eThe Hayward CX900W is the knob washer used on Star-Clear Plus cartridge filters and Pro-Grid DE separation tanks. It is the genuine Hayward part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it goes\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe washer sits under the clamp knob and spreads the load where the knob bears down. It is a small piece, but without it the knob presses directly on the clamp, which means the clamp never draws evenly and the filter head does not seal the way it should.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOrder two\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHayward specifies a quantity of two, so a filter needs a pair. If you are chasing a leak at the clamp, look at the filter head lid o-ring and the knob o-ring while you are in there, because a clamp area leak is usually one of those three parts.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48627948945620,"sku":"HAY-051-1741","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_b6dbf149-a8f2-4a19-badf-057bae13b6a8.png?v=1788730630","url":"https:\/\/www.activepoolsupply.com\/products\/star-clear-plus-knob-washer","provider":"Active Pool Supply","version":"1.0","type":"link"}