20562X254 Black Cap Filter Piston Assembly Filter Older models may have a

Older models may have a bypass with black plastic knobs--this bypass valve is a direct replacement for that one

hardness and pH

This structure

The D-15 Vertical Adapter Set allows you to mount the bypass valve vertically rather than horizontally

including:

20562X254 Black Cap Filter Piston Assembly Filter Older models may have aUsed on some older Water Soft Filters. If your piston has a black cap like the one shown in the picture, this is the piston that you need. If your piston has an Orange Cap, you need the 20922C203 If your piston has a White Cap, you need the 20561X254 Note: We recommend installing a new seal & spacer kit anytime a piston is being replaced.