The AquaSunOzone Kynar check valve is designed for compatible ozone and chemical-feed applications where one-way flow protection is needed. A check valve is useful because it helps keep gas or liquid moving in the intended direction while reducing the chance of backflow into connected equipment.This replacement is especially useful when the original valve is sticking, leaking back, cracked, or no longer sealing correctly. Matching the correct 1/4 inch barb Kynar design helps preserve intended fit and dependable ozone-system performance.The 691 is a practical service part when a compatible AquaSunOzone system needs a check valve to restore dependable one-way flow control. AquaSunOzone Kynar check valve 1/4 inch barb configuration Black finish Useful when the original valve is leaking back or worn Supports cleaner and more dependable ozone-system protection
