{"product_id":"pentair-rainbow-feeder-check-valve-1-5-2-r172288","title":"Pentair Rainbow Feeder Check Valve 1.5\" - 2\" | R172288","description":"\u003cp data-start=\"347\" data-end=\"1073\"\u003eThe Pentair R172288 Rainbow Feeder Check Valve is designed to prevent chemical backflow in Pentair Rainbow automatic chlorine and bromine feeder systems that use one and one half inch or two inch plumbing. Installed downstream of the feeder, this valve helps stop highly chlorinated water from flowing backward into pool plumbing, pumps, or heaters when circulation pressure drops. Built to original Pentair OEM performance standards, its internal spring-loaded mechanism allows smooth forward flow during operation while sealing securely when the system shuts off. Constructed from chemical-resistant materials, the R172288 supports long-term protection of sensitive equipment and reliable feeder operation.\u003c\/p\u003e\n\u003ch3 data-start=\"1075\" data-end=\"1093\"\u003e\u003cstrong data-start=\"1079\" data-end=\"1093\"\u003eHighlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1094\" data-end=\"1808\"\u003e\n\u003cli data-start=\"1094\" data-end=\"1247\"\u003e\n\u003cp data-start=\"1096\" data-end=\"1247\"\u003e\u003cstrong data-start=\"1096\" data-end=\"1129\"\u003eBackflow Protection Function:\u003c\/strong\u003e Prevents concentrated chlorinated or brominated water from reversing into heaters, pumps, and circulation plumbing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1248\" data-end=\"1383\"\u003e\n\u003cp data-start=\"1250\" data-end=\"1383\"\u003e\u003cstrong data-start=\"1250\" data-end=\"1279\"\u003eFits Multiple Pipe Sizes:\u003c\/strong\u003e Designed for compatibility with both one and one half inch and two inch pool plumbing configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1384\" data-end=\"1519\"\u003e\n\u003cp data-start=\"1386\" data-end=\"1519\"\u003e\u003cstrong data-start=\"1386\" data-end=\"1419\"\u003eSpring-Loaded Internal Valve:\u003c\/strong\u003e Allows unrestricted forward flow while closing tightly during pressure loss to protect equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1520\" data-end=\"1658\"\u003e\n\u003cp data-start=\"1522\" data-end=\"1658\"\u003e\u003cstrong data-start=\"1522\" data-end=\"1555\"\u003eChemical-Resistant Materials:\u003c\/strong\u003e Built to withstand prolonged exposure to pool chemicals and treated water without premature failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1659\" data-end=\"1808\"\u003e\n\u003cp data-start=\"1661\" data-end=\"1808\"\u003e\u003cstrong data-start=\"1661\" data-end=\"1694\"\u003eEssential Feeder Safety Part:\u003c\/strong\u003e Commonly installed with Pentair Rainbow automatic chlorinators and brominators to protect downstream equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003ePentair Rainbow Automatic Chlorine\/Bromine Chemical Feeder Models:\u003c\/strong\u003e 300, 302, 320, 322\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"4896\" data-end=\"4915\"\u003eAdditional Info\u003c\/h3\u003e\n\u003cp data-start=\"4916\" data-end=\"5329\"\u003eThe Pentair R172288 Rainbow Feeder Check Valve is designed to prevent backflow of concentrated chlorinated or brominated water in Pentair Rainbow automatic feeder systems. This section helps SOSPool.com customers confirm compatibility before ordering, understand why check valves are critical, and prepare for installation after delivery. These FAQs support online buyers through fitment and maintenance planning.\u003c\/p\u003e\n\u003ch2 data-start=\"5331\" data-end=\"5378\"\u003eCompatibility Confirmation Before Ordering\u003c\/h2\u003e\n\u003cp data-start=\"5379\" data-end=\"5444\"\u003eOnline customers often verify plumbing size and feeder placement.\u003c\/p\u003e\n\u003ch4 data-start=\"5446\" data-end=\"5506\"\u003eHow do I know the R172288 check valve fits my plumbing?\u003c\/h4\u003e\n\u003cp data-start=\"5507\" data-end=\"5617\"\u003eIf your feeder return line uses 1.5 inch or 2 inch pipe, this valve is designed to match those configurations.\u003c\/p\u003e\n\u003ch4 data-start=\"5619\" data-end=\"5682\"\u003eWill this valve work with both inline and offline feeders?\u003c\/h4\u003e\n\u003cp data-start=\"5683\" data-end=\"5740\"\u003eYes, it is commonly used downstream of both feeder types.\u003c\/p\u003e\n\u003ch4 data-start=\"5742\" data-end=\"5795\"\u003eIs this check valve required if I have a heater?\u003c\/h4\u003e\n\u003cp data-start=\"5796\" data-end=\"5881\"\u003eYes, check valves are strongly recommended to protect heaters from chemical backflow.\u003c\/p\u003e\n\u003ch2 data-start=\"5883\" data-end=\"5925\"\u003eInstallation and Setup After Delivery\u003c\/h2\u003e\n\u003cp data-start=\"5926\" data-end=\"5975\"\u003eThese FAQs help customers once the valve arrives.\u003c\/p\u003e\n\u003ch4 data-start=\"5977\" data-end=\"6027\"\u003eIs installing a feeder check valve difficult?\u003c\/h4\u003e\n\u003cp data-start=\"6028\" data-end=\"6140\"\u003eInstallation is straightforward when the pipe is properly cut, aligned, and glued in the correct flow direction.\u003c\/p\u003e\n\u003ch4 data-start=\"6142\" data-end=\"6193\"\u003eWhy is flow direction important on this valve?\u003c\/h4\u003e\n\u003cp data-start=\"6194\" data-end=\"6283\"\u003eInstalling the valve backwards will prevent proper operation and block normal water flow.\u003c\/p\u003e\n\u003ch4 data-start=\"6285\" data-end=\"6329\"\u003eWhat should I check after installation?\u003c\/h4\u003e\n\u003cp data-start=\"6330\" data-end=\"6414\"\u003eConfirm smooth forward flow and that the valve closes fully when the pump shuts off.\u003c\/p\u003e\n\u003ch2 data-start=\"6416\" data-end=\"6459\"\u003eShipping, Delivery, and Online Support\u003c\/h2\u003e\n\u003cp data-start=\"6460\" data-end=\"6526\"\u003eThese questions help customers understand the ordering experience.\u003c\/p\u003e\n\u003ch4 data-start=\"6528\" data-end=\"6579\"\u003eHow quickly does the R172288 check valve ship?\u003c\/h4\u003e\n\u003cp data-start=\"6580\" data-end=\"6671\"\u003eMost orders ship promptly, with delivery estimates shown at checkout and tracking provided.\u003c\/p\u003e\n\u003ch4 data-start=\"6673\" data-end=\"6723\"\u003eWhat should I inspect when the valve arrives?\u003c\/h4\u003e\n\u003cp data-start=\"6724\" data-end=\"6797\"\u003eCheck that the internal spring moves freely and the housing is undamaged.\u003c\/p\u003e\n\u003ch4 data-start=\"6799\" data-end=\"6857\"\u003eDo customers often order other feeder parts together?\u003c\/h4\u003e\n\u003cp data-start=\"6858\" data-end=\"6945\"\u003eYes, many add control valves, tubing fittings, or saddle gaskets during feeder service.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52442653688108,"sku":"R172288","price":34.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0698\/1943\/3260\/files\/PentairRainbowFeederCheckValve1.5-2R172288SOSPool_4.jpg?v=1769802784","url":"https:\/\/www.sospool.com\/products\/pentair-rainbow-feeder-check-valve-1-5-2-r172288","provider":"SOS Pool \u0026 Spa Supplies","version":"1.0","type":"link"}