{"product_id":"check-valve-1-3-1-5-skt-by-2-spg","title":"Del Ozone DELCHECK Check Valve, 1\/3#, 1.5\" SKT by 2\" SPG","description":"\u003cp\u003eThe DELCHECK CO-0101 is a check valve with a 1\/3 pound spring, plumbed 1.5 inch socket by 2 inch spigot.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat the spring rating tells you\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEvery check valve needs a small pressure difference before it opens. The 1\/3 pound rating here is deliberately light, so a line that is not carrying much flow can still push the valve open rather than sitting closed against it. Fitting a heavier spring in the same place is a common way to strangle a low flow circuit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDirection and sizing\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA check valve is directional, and gluing one in backwards means cutting it out again. Check the flow marking on the body before you dry fit. Sizing is worth a second look too: the listing describes the valve as 1.5 inch socket by 2 inch spigot in one place and simply as 2 inch in another, so measure both ends of the valve you are removing.\u003c\/p\u003e","brand":"Del Ozone","offers":[{"title":"Default Title","offer_id":48634787791060,"sku":"DEL-451-9868","price":32.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_26bee4b4-7616-406e-ae9e-32f76e92dc29.jpg?v=1788837525","url":"https:\/\/www.activepoolsupply.com\/products\/check-valve-1-3-1-5-skt-by-2-spg","provider":"Active Pool Supply","version":"1.0","type":"link"}