Waterway ProClean Plus Filter Lid and Lock-Ring Assembly, 75 to 100 Sq. Ft., 550-0611B

Waterway 550-0611B is the lid and lock-ring assembly for ProClean Plus cartridge filters in the 75 and 100 sq. ft. sizes. It is the genuine Waterway Plastics part.

Why the assembly

The lid and its lock-ring are sold together so the two pieces seat and thread correctly. A hairline crack in a filter lid shows up as a tank that drips at the top or will not build pressure, and this assembly is the fix.

Before you order

Confirm your ProClean Plus is a 75 or 100 sq. ft. model. Larger tanks in the line take a different lid. If the tank o-ring is flattened, replace it while the lid is off.