Rola-Chem Injector Check Valve | 521170 Chlorine Feeders Designed for manual use or

Designed for manual use or automation-compatible setups (with compatible actuator)

Hand-tighten the lid per the pump’s instructions—do not overtighten

Verify plumbing size and valve orientation before ordering and installation

Hayward AquaNaut 400 & 450/Poolvergnuegen Rear Skirt Kit Black for 4-Wheel Cleaners

Direct drop-in part number for installations specifying R121166

Rola-Chem Injector Check Valve | 521170 Chlorine Feeders Designed for manual use orRola Chem 521170 Injection Check Valve 3 8" Hose Barb x 1 4" MNPT (PVC) For Chemical Feed Lines The Rola Chem 521170 is a durable injection check valve used on pool spa chemical feed systems to help ensure one way flow into the plumbing line. It helps prevent pool water from backing up into the chemical feed tubing and supports more consistent, leak resistant chemical dosing at the injection point. Key Features Part Number: 521170 Type: Injection