Waterway Crystal Water Cartridge Manifold Plug (519-4320) mpindustries A complete assembly like this

A complete assembly like this is useful because it restores the visible and structural suction fitting in one matched part while offering a more premium finished look

A properly selected Infusion Pool fitting contributes to dependable fit

or gone missing during service

The 18 inch by 19-1/4 inch dimensions

Waterway Crystal Water Cartridge Manifold Plug (519-4320) mpindustries A complete assembly like thisThe Waterway 519 4320 cartridge manifold plug is designed for compatible Crystal Water cartridge filter systems. A manifold plug like this is an important service part because it helps complete and seal the manifold area properly, supporting correct assembly and dependable filter operation. Small internal components can have an outsized effect on maintenance quality, especially in filtration systems where a missing or damaged plug can interfere with