Valve part · Soft Water Supply

Soft Water Supply WS1 for Clack WS1 Valve Piston

Valve part

Updated October 2026

Quick verdict

A sound valve part for fixing a leak or a valve that won't cycle.

Strength
Names Clack WS1.
Trade-off
Check the exact valve generation.
Right buyer
Fixing a leak or a valve that won't cycle.
Control valve
Clack WS1
Dimensions (seller)
3 x 3 x 3 inches
Product weight
5.9 ounces
Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

What it does for your water

The Soft Water Supply WS1 for Clack WS1 Valve Piston is a replacement part for the Clack WS1 valve (part WS1).

Valve families have several generations: a timer and a metered version of the same valve share seals and pistons but not boards or meters. Match the part number in your valve's service manual before ordering.

From the listing: model WS1; valve Clack WS1.

The listing gives dimensions of 3 x 3 x 3 inches, a shipping weight of 5.9 ounces and rebuild kit in the box.

Is it the right unit for your house?

Choose it when

  • Fixing a leak or a valve that won't cycle
  • Owners who know their valve model

Pass on it when

  • Valves it doesn't name

Where it wins and where it loses

Wins

  • Names Clack WS1
  • Part WS1

Loses

  • Check the exact valve generation

Limits to know about

  • Figures are the maker's or seller's own; check fit and capacity against your water test and your equipment's manual.

Maker's figures

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model numberWS1Retailer
Product weight5.9 ouncesRetailer
Dimensions (seller)3 x 3 x 3 inchesRetailer
Control valveClack WS1Retailer

Units to weigh against it

Other control valves in the catalog

Every control valves on one grid · All Soft Water Supply units we cover

Final verdict

A sound valve part for fixing a leak or a valve that won't cycle.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

What is the Soft Water Supply WS1 for Clack WS1 Valve Piston for?
The Soft Water Supply WS1 for Clack WS1 Valve Piston is a replacement part for the Clack WS1 valve (part WS1).