How to Replace the Flow Cartridge on a Grohe Grohtherm SmartControl 210 (UK)
UK guide to swapping the flow cartridge in a Grohe Grohtherm SmartControl 210 shower valve. TMV2 compliance, part numbers, tools.
The part
Fit a new flow-control cartridge on the Grohe Grohtherm SmartControl 210 to fix stiff or leaking on/off — usually a 1/4-turn ceramic disc.
Isolate
Close the built-in isolators on the Grohe Grohtherm SmartControl 210 valve body — accessed through the escutcheon plate.
Swap the flow cartridge
Some Grohe 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 Grohe Grohtherm SmartControl 210 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 Grohe 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 Grohe?
- For TMV2/TMV3 compliance always fit genuine Grohe cartridges. Aftermarket voids the Grohtherm SmartControl 210 approval.
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