Clack WS2 Separate Source (MAV) Kit 2"

The Clack WS2 Separate Source (MAV) Kit is a specialist Manual Air Valve upgrade for 2in WS2 control valves, allowing the softener or filter to draw its regenerant or air supply from a source that's physically separated from the treated water line, and WrekinWater stocks it for commercial installers working on larger Clack-based systems across the UK. It's a significant, technical kit rather than a simple wear part, used where site plumbing, water regulations or system design require the valve's source to be isolated from the main supply.

Technical specifications

Symptoms that mean you need this part

• Site water regulations or backflow requirements mean the valve's source can no longer share the treated supply line
• An existing MAV assembly is worn, seized or leaking air/water where it shouldn't
• A commercial system is being reconfigured or relocated and needs its source plumbing isolated
• An installer has identified during a system audit that a separate source arrangement is required for compliance

Why it fails / why it matters

A separate source configuration exists so that the valve's air or regenerant supply is drawn from an isolated point rather than the main treated water line, which matters for larger commercial installations where backflow prevention, plumbing layout or water regulations require that separation. The MAV components that manage this — the manual air valve mechanism, seals and connecting hardware — are subject to the same pressure cycling and wear as the rest of the valve, and on a 2in commercial system a worn or incorrectly specified separate source kit can lead to air lock, inconsistent regeneration or a compliance issue that needs addressing by a qualified installer.

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 WS2 Separate Source MAV kit, so commercial installers can source the correct specialist kit rather than trying to improvise a solution. As UK Company No. 11000488 and rated Excellent on Trustpilot, the team is available to talk through site requirements before you order a kit of this complexity and cost.

How to fit it

1. Have a competent water treatment installer assess the existing plumbing layout and confirm the separate source arrangement required for the site
2. Isolate the water supply and depressurise the system fully before beginning any work on the valve
3. Remove the existing source connection hardware from the 2in WS2 valve, noting the current configuration
4. Fit the new Separate Source (MAV) kit according to Clack's installation instructions, ensuring correct orientation and torque on all fittings
5. Reconnect the source plumbing and restore water supply, checking for leaks at every joint under pressure
6. Commission the system with a full test regeneration cycle, confirming the manual air valve operates correctly and the source remains properly isolated