Clack WS1.25 CI Water Softener, metered valve, 1.25in V125CIDME-08

The Clack WS1.25 CI Water Softener metered valve V125CIDME-08, available from WrekinWater, is a complete 1.25" cast-iron-bodied control valve that regenerates on actual water usage rather than a fixed clock, making it a more efficient replacement for larger households, private water supplies or commercial sites softening at higher flow rates. Its metered (demand-initiated) control only triggers regeneration when the resin bed genuinely needs it, saving salt and water compared with a timer-only valve.

Technical specifications

Symptoms that mean you need this part

• Hard water getting through — limescale returning on taps, shower screens or appliances — despite the softener appearing to run
• The valve body has cracked, corroded or developed leaks that seal kits can no longer resolve
• The meter or electronic controller has failed, lost accuracy, or is obsolete and no longer serviceable
• Regeneration is inconsistent, doesn't trigger reliably, or fault codes keep recurring after repair attempts

Why it fails / why it matters

Metered softener valves rely on an internal turbine or meter to track water usage accurately and trigger regeneration at the right point, and after years of continuous higher-flow use that meter mechanism, the piston seals, or the cast iron body itself can wear or fail to the point where individual repair kits no longer restore reliable performance. Once metering accuracy drops or the valve body is compromised, the softener either regenerates too often (wasting salt and water) or too rarely (letting hard water through), and a full valve replacement resolves both issues at once.

Why buy this from WrekinWater

WrekinWater has served more than 50,000 customers over 15 years from Bettisfield, Shropshire, and we stock genuine Clack metered valve assemblies alongside Pentair Fleck, Autotrol and Kinetico equivalents for larger residential and commercial softening systems. Rated "Excellent" on Trustpilot and registered as UK Company No. 11000488, we can help you confirm compatibility with your existing tank before ordering.

How to fit it

1. Have a competent installer or water treatment engineer confirm your tank head thread, flow rate and resin volume match this 1.25" metered valve before ordering.
2. Isolate the water supply and fully depressurise the softener vessel before removing the existing valve.
3. Remove the existing control valve from the tank head, noting inlet, outlet, drain and brine line connections.
4. Fit the new Clack WS1.25 CI metered valve to the tank head with new O-rings/seals, ensuring the riser tube and meter turbine seat correctly.
5. Reconnect drain and brine lines, restore the water supply gradually and check every connection for leaks.
6. Program the controller with your correct resin volume, water hardness and salt dose, then run a full test regeneration before returning the softener to service.