Hayward 1/4" MPT Bottom Mount Pressure Gauge w/Dial [0-60psi] (ECX271261) cgairsystems A half union is useful

A half union is useful because it allows plumbing sections to be disconnected more easily during maintenance while still preserving a secure

Choosing the fitting with the locknut included can help simplify the repair and improve installation confidence

1/2 inch by 1 inch sizing supports intended geometry and fit

Helps restore sealing at the main tank body connection

Hayward 1/4" MPT Bottom Mount Pressure Gauge w/Dial [0-60psi] (ECX271261) cgairsystems A half union is usefulThe Hayward bottom mount pressure gauge with dial is designed for compatible filter and circulation applications where visible pressure monitoring is needed. A pressure gauge is useful because it helps show system pressure clearly, supporting routine maintenance and helping identify when cleaning or service may be required. This replacement is especially useful when the original gauge is leaking, cracked, fogged, inaccurate, or no longer readable.