Pentair Rainbow 320 Automatic Feeder 1/2" Control Valve (R172086Z) hayward Check gasket fit

Check gasket fit

This replacement is especially useful when the original tube bundle is scaled

or showing signs of thermostat wear

That helps keep the installation more consistent and service-friendly over time

5P4-M compatibility give this part practical value because cartridge filters work best when the replacement matches the intended housing and application closely

Pentair Rainbow 320 Automatic Feeder 1/2" Control Valve (R172086Z) hayward Check gasket fitThe Rainbow 320 automatic feeder 1 2 inch control valve helps regulate chemical delivery in compatible Pentair feeder installations. Proper valve function is important because sanitizer output needs to be controlled without leaks, binding, or erratic adjustment. If the current valve is difficult to turn, visibly damaged, or no longer providing predictable flow control, this replacement can help bring the feeder back to normal service. It is a targeted