Hayward Filter O-Ring | GMX400F Hammer-Head Ideal for retrofit or new-install

Ideal for retrofit or new-install projects

Includes: 50 lb Bag of Polished Lava Rock

so when it sticks

Non-stackable design ensures a sturdy build

Hayward Filter O-Ring | GMX400F Hammer-Head Ideal for retrofit or new-installWhat This Part Is Used For The Hayward GMX400F O Ring provides a sealing surface for compatible Hayward filter or valve assemblies. It prevents water leaks at connection points. Why This Part Matters A worn or flattened O ring can cause air leaks, water seepage, or pressure loss. Replacing it restores proper sealing and system integrity. Small sealing components play a major role in overall equipment performance. Key Features and Specifications