Clack WS1.5CI Softener, Metered controlled valve, 1.5in

The Clack WS1.5CI Softener metered controlled valve, available from WrekinWater, is a complete 1.5" cast-iron control valve built for the highest-flow commercial and industrial water softening applications, regenerating on actual water usage rather than a fixed clock. As the flagship valve in the Clack CI softener range, it's the correct full-assembly replacement for large commercial installations where the existing valve is no longer reliably keeping up with demand.

Technical specifications

Symptoms that mean you need this part

• Hard water breakthrough at this scale — limescale on commercial equipment despite the softener running
• The cast iron valve body shows corrosion, cracking or leaks that repair kits can no longer fix
• The metering turbine or electronic controller has failed, lost accuracy, or is obsolete
• Regeneration is inconsistent, fails to trigger correctly, or persistent faults keep recurring under high demand

Why it fails / why it matters

At commercial and industrial flow rates, a metered softener valve's internal turbine, piston and seals are working almost continuously, and after years of sustained high-volume use the meter can lose accuracy, the cast iron body can corrode at fittings, or the drive mechanism can wear to the point where seal kits alone no longer restore dependable operation. Once metering accuracy or valve integrity is compromised at this scale, the consequences — wasted salt, wasted water, or hard water reaching process equipment — are significant, making a full valve replacement the reliable fix.

Why buy this from WrekinWater

WrekinWater has served more than 50,000 customers over 15 years from Bettisfield, Shropshire, and we stock genuine Clack CI valve assemblies for large commercial softening systems alongside Pentair Fleck, Autotrol and Kinetico ranges. Rated "Excellent" on Trustpilot and registered as UK Company No. 11000488, we can help confirm this valve is the correct match for your existing commercial installation before you order.

How to fit it

1. Have a competent installer or water treatment engineer survey your existing system and confirm tank head thread, flow demand and resin volume match this 1.5" metered valve.
2. Isolate the water supply and fully depressurise the softener vessel before removing the existing valve.
3. Remove the old control valve from the tank head, recording inlet, outlet, drain and brine line connections.
4. Fit the new Clack WS1.5CI metered valve to the tank head with new O-rings/seals, ensuring the riser tube and meter turbine are correctly seated.
5. Reconnect drain and brine pipework, restore the water supply gradually and pressure-test every joint for leaks.
6. Program the controller with correct resin volume, hardness and salt dose settings, then run a full commissioning regeneration before returning the system to service.