{"product_id":"pentairvalvecheckoldstyler172020penr172020","title":"Pentair Valve Check Old Style | R172020","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair Rainbow Old Style Optional Check Valve | R172020\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Pentair Rainbow R172020 is an “old style” optional check valve used in select Pentair\/Rainbow automatic\n    chemical feeder and accessory plumbing. This one-way valve helps prevent backflow in the small feeder tubing line,\n    protecting equipment and helping maintain more stable chlorine\/bromine feed performance.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat This Part Does\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrevents reverse flow (backflow)\u003c\/strong\u003e in the feeder\/indicator tubing line when the pump shuts off or pressure changes.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHelps protect equipment\u003c\/strong\u003e by reducing the chance of concentrated sanitizer water migrating the wrong direction.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSupports consistent dosing\u003c\/strong\u003e by keeping the feeder line operating in the intended direction.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePentair\/Rainbow offline automatic feeders:\u003c\/strong\u003e Models 300, 302, 300-19, 300-29\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePentair\/Rainbow High Capacity (HC) feeders:\u003c\/strong\u003e HC-3315, HC-3330, HC-3340 (where specified as an optional\/old-style check valve)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRainbow feeder accessories:\u003c\/strong\u003e certain flow indicator \/ dispenser extensions where the parts list calls for R172020\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSigns You May Need to Replace It\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eFeeder line appears to drain backward or won’t hold prime\u003c\/li\u003e\n    \u003cli\u003eInconsistent sanitizer output after you’ve already dialed in feeder settings\u003c\/li\u003e\n    \u003cli\u003eRestricted flow through the feeder line (valve sticking or internal wear)\u003c\/li\u003e\n    \u003cli\u003eDrips\/leaks at the valve body or tubing connections\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eShut off the pump and relieve pressure before servicing any feeder tubing.\u003c\/li\u003e\n    \u003cli\u003eInstall with the correct \u003cstrong\u003eflow direction\u003c\/strong\u003e (one-way operation). Installing backwards can block proper flow.\u003c\/li\u003e\n    \u003cli\u003eCut tubing cleanly and square; fully seat tubing in the fitting before tightening compression nuts or clamps.\u003c\/li\u003e\n    \u003cli\u003eAfter restart, inspect for leaks and confirm normal feeder\/indicator operation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Pentair \/ Rainbow\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e R172020\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Check valve (old style optional)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Sold individually\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=R172023Z\"\u003e3\/8\" Feeder Tubing (R172023Z)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=R172032Z\"\u003e3\/8\" Tube Fitting w\/ Compression Nut (R172032Z)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=R172034Z\"\u003eSaddle Clamp for 3\/8\" Tube Fitting (R172034Z)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=R172275\"\u003eRainbow 300-29X Hardware \/ Parts Bag (R172275)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/pages\/search-results-page?q=Rainbow%20300%20parts\"\u003eRainbow Model 300\/302 Feeder Parts\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eInspect feeder tubing and small fittings seasonally; replace brittle or discolored tubing before it starts leaking.\u003c\/li\u003e\n    \u003cli\u003eKeep water chemistry balanced—high calcium and high pH can contribute to scale that affects small valves and lines.\u003c\/li\u003e\n    \u003cli\u003eIf feeder output suddenly changes, check the tubing path for kinks and confirm the check valve is oriented correctly.\u003c\/li\u003e\n    \u003cli\u003eDuring winterization, drain feeder lines and protect small plastic parts from freeze damage.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Pentair","offers":[{"title":"Default Title","offer_id":46797899104431,"sku":"R172020","price":9.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/freshized.com\/products\/pentairvalvecheckoldstyler172020penr172020","provider":"Freshized","version":"1.0","type":"link"}