Hayward Vac-Lock Black Free Rotation Kit (W400BBKP) gentekk A union like this is

A union like this is useful because it allows the connection to be disconnected for service later while still supporting a clean

When a cover O-ring becomes flattened

That keeps integration cleaner and avoids unnecessary compatibility issues

or service record

this check valve helps support cleaner flow control and gives the system a more dependable operating feel overall

Hayward Vac-Lock Black Free Rotation Kit (W400BBKP) gentekk A union like this isThe Hayward Vac Lock free rotation kit is designed for compatible wall suction and vacuum lock applications where the rotating connection components need replacement. A free rotation kit is useful because it helps the hose or attachment rotate more freely, reducing twisting and supporting easier vacuuming or cleaner movement. This replacement is especially useful when the original rotation components are worn, sticking, cracked, or damaged. Matching