The O rings close fits the tailpiece grooves to form a waterproof seal, effectively leakage and balancing and Make from high-strength, enduring and resistant The rubber O-rings features wear and oxidation resistance, extending equipment lifespans and reducing maintenance frequency Easy Installation: Professional technicians can install the vacuum breaker repair set without complex tools Simple steps: turn off the water supply, remove the cover, and replace the components and O-rings Stable: Replacing the aging parts of the vacuum breaker repair set quickly restores the anti-siphon function, ensuring efficient flushing and water conservation The V-551-A vacuum breaker repair set is tailor make for the maintenance and replacement of valves units.The O-rings can directly replace models 5308696, P6000-C31 and A912809-0070A, Manufacturer: TQUXNGA