Clack Parts

Verified Clack WS1 and WS1.25 control-valve repair-part references. Every item is currently unavailable for purchase.

Clack selection guide

Distinguish WS1 from WS1.25 before choosing internal parts

Clack WS1 and WS1.25 controls look related but use different main pistons and spacer stacks. Downflow, upflow, and backwash-only configurations also change the piston, regenerant-piston use, and injector position. Do not infer fitment from the controller face or part shape.

Compare the valve body and distributor opening with the WS1 versus WS1.25 guide. Continue with the WS1 model reference, the WS1.25 reference, or an exact V-series part-number search.