Pontcanna Brassworks
What is included
- ✓In-wall valve diagnostic using thermal sensing
- ✓Faceplate and control knob removal without tile damage
- ✓Thermostatic wax element and piston renewal
- ✓Integral spring check valve replacement
- ✓Two-way and three-way diverter valve re-gearing
- ✓Max-temperature safety calibration to 41 degrees Celsius
Request an Engineering Visit or Part Inspection
Submit your enquiry below and an engineer will contact you shortly to confirm details.
Questions about this service
What if my concealed shower is ten years old and the maker is out of business?
Many brands used standard brass cartridges produced by specialized valve foundries. We identify the internal cartridge by thread pattern and dimensions.
Why does my shower go freezing cold when a toilet is flushed?
This indicates worn check valves or a tired thermostatic piston that cannot balance dynamic pressure fluctuations quickly enough.
Do you need to knock a hole through the wall behind the shower?
In the vast majority of cases, no. Concealed valves are designed for front-facing internal service.
How We Carry Out Work
- 1Expose internal brass bodyWe release the chrome or brass faceplate, slice through waterproof silicone neatly, and remove outer control sleeves.
- 2Extract thermostatic coreUsing matched deep-reach wrenches, we withdraw the thermostatic capsule and diverter assembly from the wall cavity.
- 3Descale and fit replacement partsWe clear limescale from the internal chamber and fit factory-spec wax elements, stainless check valves, and EPDM seals.
- 4Calibrate and waterproof re-sealWe set the mechanical high-limit safety stop, test hot and cold shut-off safety response, and reseal the wall perimeter.
Twelve-Month Mechanical Workmanship Guarantee
Every brass component we supply and fit is guaranteed against mechanical failure and leaks for twelve months. If an installed valve or rebuilt cartridge weeps or fails under normal use during this period, we return promptly and rectify it at no cost to you. Pricing & payment
Why Work With Pontcanna Brassworks
Saves your bathroom tiles
All overhaul work is completed through the existing front opening, avoiding structural tile repairs.
Scald protection restored
A functional thermostatic unit instantly cuts water flow if the cold water supply fails unexpectedly.
Restores sharp diverter switching
Rebuilt diverters channel full flow cleanly between fixed overhead showers and handheld handsets.
All services
Book an Engineer for Your Pipework or Brassware
Send us your fault details or call directly. We review your request and confirm a fixed site arrival window within two business hours.