Clack WS1TC Softener Time Controlled Valve 1" V1TCDTE-05

The Clack WS1TC time-controlled softener valve (V1TCDTE-05) is a complete 1in control head that regenerates the softener on a fixed clock schedule, and WrekinWater stocks it as a genuine replacement for UK homes and installers running Clack WS1TC-based softener systems. It's a well-proven, simple valve platform for properties where water use is fairly predictable and a set-and-forget regeneration schedule suits the household better than a metered, demand-based cycle.

Technical specifications

Symptoms that mean you need this part

• The softener no longer regenerates at its scheduled time, or the cycle has stopped altogether
• Water hardness returns before the next scheduled regeneration despite normal water use
• The timer resets or loses its programme after every power interruption
• Visible cracking, leaking, or a damaged fitting on the existing control valve body

Why it fails / why it matters

This valve's clock motor, drive gears and piston assembly work together to open the backwash, brine draw and rinse ports at the programmed time, and years of continuous operation under mains pressure wear the seals and internal mechanism that keep this timing accurate. Once the clock drifts, the piston sticks, or the drive motor fails, the softener either regenerates at the wrong time or stops cycling completely, and because these parts are built into a sealed head assembly, replacing the whole valve is the practical fix rather than chasing individual components.

Why buy this from WrekinWater

WrekinWater has served more than 50,000 customers over 15 years from its base in Bettisfield, Shropshire, and stocks genuine Pentair Fleck, Autotrol, Clack and Kinetico parts including this Clack WS1TC softener valve, so you can order the correct V1TCDTE-05 assembly with confidence. As UK Company No. 11000488 and rated Excellent on Trustpilot, the team is available to confirm compatibility with your existing tank before you buy and to support installers through commissioning.

How to fit it

1. Isolate the water supply and depressurise the softener before removing the old valve
2. Disconnect the drain hose, brine line and power supply from the existing time-controlled head
3. Remove the old valve from the resin tank, checking the riser tube and tank O-ring as you go
4. Fit the new V1TCDTE-05 valve, ensuring the riser tube seats fully and the tank thread engages cleanly
5. Reconnect drain, brine and inlet/outlet pipework, then restore water and power
6. Have a competent water treatment installer set the regeneration day, time and cycle length, and run a test regeneration before the softener returns to daily use