Wellfield MechanicalThermostatic Cartridge Servicing
Suited for mixer showers delivering only scalding or freezing water, or exhibiting weak flow. We isolate the mixer, extract the thermostatic wax element, descale the mixing chamber, and install a genuine replacement cartridge. Safe, calibrated temperature control is restored.
What is included
- ✓Shower valve isolations
- ✓Thermostatic capsule extraction
- ✓Scale removal from internal ports
- ✓Check valve and filter cleaning
- ✓New thermostatic cartridge fitting
- ✓Thermal shut-off calibration
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We will review your details and confirm available appointment times shortly.
How we work
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1
Isolating Feeds
Balanced hot and cold incoming lines are closed and depressurised.
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2
Faceplate Removal
Cover plates, handles, and stop rings are removed carefully from tiles.
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3
Chamber Service
The mixing cylinder is cleaned of scale build-up and check valve filters rinsed.
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4
Thermal Calibration
We insert the new cartridge and adjust the temperature stop to 38 degrees Celsius.
Questions about this service
How do you identify which cartridge fits my concealed shower?
We check the dimensions, thread pitch, and gear teeth count against manufacturer specifications.
Why is my shower only running lukewarm?
This usually indicates the internal wax capsule has seized or cold-side check valves are jammed.
Is the maximum heat setting adjustable?
Yes, we set the physical safety stop to your desired upper limit during reassembly.
Why choose Wellfield Mechanical
Accurate water blending for concealed and exposed showers.
Scald Prevention
The valve shuts off water within seconds if cold water feed pressure fails.
No Retiling Required
Work is completed through the existing wall cavity opening without disturbing tiles.
Stable Temperature
Water remains comfortable even when other taps open elsewhere in the property.
Twelve-month workmanship standard
Every valve, fitting, and pipe joint we install is covered by our twelve-month workmanship guarantee. If a fitted joint we installed leaks or weeps within that period, we return and rectify it at no charge. Pricing & payment
All services
Isolation Valve Replacement
Reliable shut-off valves fitted to your pipework.
from £85 per valve
Pressure Reducing Valve Fitting
Controlled water pressure throughout your interior network.
from £160 per installation
Tap Cartridge and Spindle Repair
Precise mechanical repair for dripping taps and mixers.
from £75 per tap
What our clients say
Prompt arrival and dry pipes.
Rhys T., Cardiff, GBNeat copper soldering under the sink.
Carys M., Cardiff, GBThe technician diagnosed our noisy thermostatic cartridge and replaced it without fuss.
Alun P., Cardiff, GBNeed a valve replaced or pipe altered?
Send a short message with your location and the issue. We will call you back within two hours with clear options.