{"product_id":"r172288-pentair-rainbow-feeder-check-valve-1-5-2","title":"R172288 | Pentair Rainbow Feeder Check Valve 1.5\" - 2\"","description":"\u003cp data-end=\"715\" data-start=\"0\"\u003eThe Pentair R172288 Rainbow Feeder Check Valve is designed to prevent backflow in Pentair Rainbow automatic chlorine and bromine feeder systems using 1.5 inch or 2 inch plumbing. Installed downstream of the feeder, this check valve helps stop highly chlorinated water from flowing backward into the pool plumbing, pump, or heater when the system shuts off. Its internal spring-loaded design allows normal forward flow while closing securely during pressure loss, protecting sensitive equipment from chemical damage. Built from durable, chemical-resistant materials, the R172288 check valve is commonly used during new feeder installations or when replacing worn or sticking valves in existing Rainbow feeder setups.\u003c\/p\u003e\n\u003ch3 data-end=\"731\" data-start=\"717\"\u003eHighlights\u003c\/h3\u003e\n\u003cul data-end=\"1335\" data-start=\"732\"\u003e\n\u003cli data-end=\"863\" data-start=\"732\"\u003e\n\u003cp data-end=\"863\" data-start=\"734\"\u003e\u003cstrong data-end=\"765\" data-start=\"734\"\u003eBackflow Prevention Design:\u003c\/strong\u003e Stops concentrated chlorinated water from reversing into heaters, pumps, or other pool equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"971\" data-start=\"864\"\u003e\n\u003cp data-end=\"971\" data-start=\"866\"\u003e\u003cstrong data-end=\"894\" data-start=\"866\"\u003eDual Pipe Compatibility:\u003c\/strong\u003e Designed for use with both 1.5 inch and 2 inch pool plumbing configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1078\" data-start=\"972\"\u003e\n\u003cp data-end=\"1078\" data-start=\"974\"\u003e\u003cstrong data-end=\"1002\" data-start=\"974\"\u003eSpring-Loaded Operation:\u003c\/strong\u003e Allows smooth forward water flow while sealing tightly when pressure drops.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1202\" data-start=\"1079\"\u003e\n\u003cp data-end=\"1202\" data-start=\"1081\"\u003e\u003cstrong data-end=\"1118\" data-start=\"1081\"\u003eChemical- Resistant Construction:\u003c\/strong\u003e Built to withstand prolonged exposure to chlorine, bromine, and treated pool water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1335\" data-start=\"1203\"\u003e\n\u003cp data-end=\"1335\" data-start=\"1205\"\u003e\u003cstrong data-end=\"1237\" data-start=\"1205\"\u003eFeeder Protection Component:\u003c\/strong\u003e Commonly installed with Pentair Rainbow automatic chlorinators and brominators for system safety.\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\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003cb id=\"docs-internal-guid-00afa6e7-7fff-ad96-a2ae-94251a69a981\"\u003eNote: \u003c\/b\u003eThis part may be compatible with your system, please refer to your owners manual to ensure compatibility.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"263\" data-end=\"282\"\u003eAdditional Info\u003c\/h3\u003e\n\u003cp data-start=\"283\" data-end=\"703\"\u003eThe Pentair R172288 Rainbow Feeder Check Valve is used to prevent chemical backflow in Pentair Rainbow automatic chlorine and bromine feeder systems. This section helps Discount Pool Mart walk-in customers identify backflow-related issues, confirm proper pipe sizing, and prepare for installation before picking up the valve locally. These FAQs focus on compatibility, troubleshooting, and common feeder safety concerns.\u003c\/p\u003e\n\u003ch2 data-start=\"705\" data-end=\"742\"\u003eCompatibility and Feeder Fitment\u003c\/h2\u003e\n\u003cp data-start=\"743\" data-end=\"810\"\u003eWalk-in customers often ask how to confirm correct valve placement.\u003c\/p\u003e\n\u003ch4 data-start=\"812\" data-end=\"887\"\u003eHow do I know if the R172288 check valve fits my Rainbow feeder setup?\u003c\/h4\u003e\n\u003cp data-start=\"888\" data-end=\"1103\"\u003eIf your feeder is installed on 1.5 inch or 2 inch return plumbing downstream of the pump, this valve is commonly used. Bringing photos of your plumbing layout to Discount Pool Mart helps verify placement and sizing.\u003c\/p\u003e\n\u003ch4 data-start=\"1105\" data-end=\"1178\"\u003eCan this check valve be used with both chlorine and bromine feeders?\u003c\/h4\u003e\n\u003cp data-start=\"1179\" data-end=\"1270\"\u003eYes, it is designed for Pentair Rainbow automatic feeders using either chlorine or bromine.\u003c\/p\u003e\n\u003ch4 data-start=\"1272\" data-end=\"1333\"\u003eDoes this valve work on both inline and offline feeders?\u003c\/h4\u003e\n\u003cp data-start=\"1334\" data-end=\"1432\"\u003eYes, it is commonly installed downstream of both inline and offline Rainbow feeder configurations.\u003c\/p\u003e\n\u003ch2 data-start=\"1434\" data-end=\"1478\"\u003eBackflow Prevention and Troubleshooting\u003c\/h2\u003e\n\u003cp data-start=\"1479\" data-end=\"1547\"\u003eThese questions help customers understand why the valve is critical.\u003c\/p\u003e\n\u003ch4 data-start=\"1549\" data-end=\"1604\"\u003eWhat problems occur if a feeder check valve fails?\u003c\/h4\u003e\n\u003cp data-start=\"1605\" data-end=\"1727\"\u003eWithout a working check valve, highly chlorinated water can flow backward into heaters or pumps when the system shuts off.\u003c\/p\u003e\n\u003ch4 data-start=\"1729\" data-end=\"1796\"\u003eHow can I tell if my existing check valve is stuck or failing?\u003c\/h4\u003e\n\u003cp data-start=\"1797\" data-end=\"1916\"\u003eCommon signs include chemical odor near equipment, heater corrosion, or visible scale buildup downstream of the feeder.\u003c\/p\u003e\n\u003ch4 data-start=\"1918\" data-end=\"1984\"\u003eDoes a spring-loaded check valve require regular replacement?\u003c\/h4\u003e\n\u003cp data-start=\"1985\" data-end=\"2089\"\u003eOver time, springs and seals can weaken due to chemical exposure, making periodic replacement important.\u003c\/p\u003e\n\u003ch2 data-start=\"2091\" data-end=\"2130\"\u003eIn-Store Pickup and Local Guidance\u003c\/h2\u003e\n\u003cp data-start=\"2131\" data-end=\"2200\"\u003eThese FAQs help customers prepare before visiting Discount Pool Mart.\u003c\/p\u003e\n\u003ch4 data-start=\"2202\" data-end=\"2272\"\u003eShould I bring pipe measurements or photos before picking one up?\u003c\/h4\u003e\n\u003cp data-start=\"2273\" data-end=\"2370\"\u003eYes, walk-in customers often bring photos to confirm whether 1.5 inch or 2 inch plumbing is used.\u003c\/p\u003e\n\u003ch4 data-start=\"2372\" data-end=\"2425\"\u003eIs this check valve typically available locally?\u003c\/h4\u003e\n\u003cp data-start=\"2426\" data-end=\"2510\"\u003eIt is commonly stocked, though checking availability before visiting is recommended.\u003c\/p\u003e\n\u003ch4 data-start=\"2512\" data-end=\"2580\"\u003eDo customers often replace other feeder parts at the same time?\u003c\/h4\u003e\n\u003cp data-start=\"2581\" data-end=\"2662\"\u003eYes, tubing, control valves, and saddle gaskets are frequently serviced together.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":51052046582048,"sku":"R172288","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/R172288PentairRainbowFeederCheckValve1.5-2DiscountPoolMart_4.jpg?v=1769802734","url":"https:\/\/discountpoolmart.com\/products\/r172288-pentair-rainbow-feeder-check-valve-1-5-2","provider":"Discount Pool Mart","version":"1.0","type":"link"}