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Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
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R172288 | Pentair Rainbow Feeder Check Valve 1.5" - 2"
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CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
The 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.
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Backflow Prevention Design: Stops concentrated chlorinated water from reversing into heaters, pumps, or other pool equipment.
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Dual Pipe Compatibility: Designed for use with both 1.5 inch and 2 inch pool plumbing configurations.
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Spring-Loaded Operation: Allows smooth forward water flow while sealing tightly when pressure drops.
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Chemical- Resistant Construction: Built to withstand prolonged exposure to chlorine, bromine, and treated pool water.
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Feeder Protection Component: Commonly installed with Pentair Rainbow automatic chlorinators and brominators for system safety.
- Pentair Rainbow Automatic Chlorine/Bromine Chemical Feeder Models: 300, 302, 320, 322
Note: This part may be compatible with your system, please refer to your owners manual to ensure compatibility.