Waterway Crystal Water Cartridge Manifold Plug (519-4320) mpindustries or gone missing during service

or gone missing during service

The 18 inch by 19-1/4 inch dimensions

Supports easier pool vacuum setup and use

Genuine Balboa Water Group pump replacement

the larger system often loses its core operating function

Waterway Crystal Water Cartridge Manifold Plug (519-4320) mpindustries or gone missing during serviceThe 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