How to Replace the Flow Cartridge on a Aqualisa Quartz Digital DCV (UK)
UK guide to swapping the flow cartridge in a Aqualisa Quartz Digital DCV shower valve. TMV2 compliance, part numbers, tools.
Aqualisa
The part
Fit a new flow-control cartridge on the Aqualisa Quartz Digital DCV to fix stiff or leaking on/off — usually a 1/4-turn ceramic disc.
Isolate
Close the built-in isolators on the Aqualisa Quartz Digital DCV valve body — accessed through the escutcheon plate.
Swap the flow cartridge
Some Aqualisa valves use handed cartridges (L/R). Match the flat on the spindle to the handle orientation before refitting.
Commission
Balance hot and cold to within 0.5 bar. Run the Aqualisa Quartz Digital DCV at max flow for 3 minutes.
Verify max outlet temperature stays below 46 °C per BS EN 1111 by shutting off cold and reading the outlet.
Frequently asked questions
- Standard or reversed?
- Standard Aqualisa cartridges close clockwise. Reverse handles will require the -R variant.
- Any grease?
- Silicone grease only — petroleum jelly attacks the EPDM seals.
- OEM or aftermarket for Aqualisa?
- For TMV2/TMV3 compliance always fit genuine Aqualisa cartridges. Aftermarket voids the Quartz Digital DCV approval.
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