{"product_id":"stenner-pumps-mcdbinj-duckbill-check-valve-santoprene-25-5-pack","title":"Stenner Pumps Duckbill Check Valve Santoprene .25 inch, 5 Pack","description":"\u003cp\u003eA five pack of Stenner Santoprene duckbill check valves in the .25 inch size, part number MCDBINJ.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat the duckbill does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt is the one way element in a chemical injection fitting. Under pump pressure the slit opens and chemical passes into the line. When the pump is between strokes or off, the slit closes and system pressure cannot push water back up the feed tube toward the pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy they come in fives\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDuckbills are a wear part. Constant chemical contact hardens the Santoprene until the slit stops sealing, and a duckbill that will not close lets system water back into the feed line. Buying a pack means the spare is already on the shelf the next time a feeder starts behaving oddly.\u003c\/p\u003e","brand":"Stenner Pumps","offers":[{"title":"Default Title","offer_id":48633454624980,"sku":"MCDBINJ-5PACK","price":88.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_df89c42b-fdbd-4e38-a577-80751544f731.png?v=1788804968","url":"https:\/\/www.activepoolsupply.com\/products\/stenner-pumps-mcdbinj-duckbill-check-valve-santoprene-25-5-pack","provider":"Active Pool Supply","version":"1.0","type":"link"}