Pentair Rainbow Feeder Check Valve 1.5" - 2" | R172288

The 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.

Highlights

• Backflow Protection Function: Prevents concentrated chlorinated or brominated water from reversing into heaters, pumps, and circulation plumbing.

• Fits Multiple Pipe Sizes: Designed for compatibility with both one and one half inch and two inch pool plumbing configurations.

• Spring-Loaded Internal Valve: Allows unrestricted forward flow while closing tightly during pressure loss to protect equipment.

• Chemical-Resistant Materials: Built to withstand prolonged exposure to pool chemicals and treated water without premature failure.

• Essential Feeder Safety Part: Commonly installed with Pentair Rainbow automatic chlorinators and brominators to protect downstream equipment.

Compatibility

• Pentair Rainbow Automatic Chlorine/Bromine Chemical Feeder Models: 300, 302, 320, 322

Additional Info

The 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.

Compatibility Confirmation Before Ordering

Online customers often verify plumbing size and feeder placement.

How do I know the R172288 check valve fits my plumbing?

If your feeder return line uses 1.5 inch or 2 inch pipe, this valve is designed to match those configurations.

Will this valve work with both inline and offline feeders?

Yes, it is commonly used downstream of both feeder types.

Is this check valve required if I have a heater?

Yes, check valves are strongly recommended to protect heaters from chemical backflow.

Installation and Setup After Delivery

These FAQs help customers once the valve arrives.

Is installing a feeder check valve difficult?

Installation is straightforward when the pipe is properly cut, aligned, and glued in the correct flow direction.

Why is flow direction important on this valve?

Installing the valve backwards will prevent proper operation and block normal water flow.

What should I check after installation?

Confirm smooth forward flow and that the valve closes fully when the pump shuts off.

Shipping, Delivery, and Online Support

These questions help customers understand the ordering experience.

How quickly does the R172288 check valve ship?

Most orders ship promptly, with delivery estimates shown at checkout and tracking provided.

What should I inspect when the valve arrives?

Check that the internal spring moves freely and the housing is undamaged.

Do customers often order other feeder parts together?

Yes, many add control valves, tubing fittings, or saddle gaskets during feeder service.