Introduction
This user manual provides comprehensive instructions for the installation, operation, maintenance, and troubleshooting of your Bristan MINI2 C Mini TS1203 CL Chrome Shower Valve. Please read this manual thoroughly before installation and use to ensure safe and efficient operation.
The Bristan MINI2 C Mini TS1203 CL is an OPAC thermostatic TMV3 concealed mini valve featuring a chrome lever. It offers single sequential control for both temperature and flow, designed for concealed shower installations with an easy-access cover plate for servicing. This valve includes integral isolators and easy-clean filters, ensuring high performance even at low pressures. Its main construction material is brass.
Safety Information
Always ensure that all plumbing work is carried out by a qualified professional and complies with local building and plumbing codes. Turn off the main water supply before beginning any installation or maintenance work. Do not attempt to modify the valve in any way. Use only genuine Bristan replacement parts.
- Ensure water supply is turned off before installation or maintenance.
- This product must be installed by a competent person.
- Do not use abrasive cleaners or materials on the chrome finish.
- Maintain proper water pressure as specified in the specifications section.
Package Contents
Upon opening the package, verify that all components are present and undamaged:
- 1 x Bristan MINI2 C Mini TS1203 CL Shower Valve
- 1 x Concealing Plate
- 1 x Fitting Instructions (this manual)

Image: Front view of the Bristan MINI2 C Mini TS1203 CL Chrome Shower Valve with its concealing plate.
Setup and Installation
The Bristan MINI2 C Mini TS1203 CL shower valve is designed for concealed installation. Ensure adequate access for future servicing via the easy-access cover plate.
Pre-Installation Checks:
- Verify that your water system meets the pressure requirements (refer to Specifications).
- Flush the pipework thoroughly to remove any debris before connecting the valve.
- Ensure the installation area allows for the valve's dimensions and required clearances.
Installation Steps:
- Turn off the main water supply to the property.
- Position the valve within the wall cavity, ensuring it is level and securely mounted. The inlet centers are 99mm +/- 1mm.
- Connect the hot and cold water supplies to the clearly marked inlets on the valve. Ensure all connections are watertight.
- Connect the outlet to your shower head or riser rail.
- Once connections are secure, slowly turn on the main water supply and check for leaks.
- Install the concealing plate over the valve body, ensuring it sits flush with the finished wall surface.
- Attach the control lever.

Image: Example of the Bristan MINI2 C Mini TS1203 CL Chrome Shower Valve installed in a shower environment.
Operating Instructions
The Bristan MINI2 C Mini TS1203 CL shower valve features a single sequential control for both temperature and flow.
- Turning On/Off: Rotate the control lever clockwise to turn the water on and increase flow. Rotate counter-clockwise to decrease flow and turn off the water.
- Adjusting Temperature: As you rotate the lever, the temperature will sequentially change from cold to hot. The thermostatic element will maintain your desired temperature, preventing sudden fluctuations.
- Temperature Override: If applicable, some models may have a temperature override button or stop. Consult the markings on your specific valve for details.
The valve is designed to provide high performance even at low pressures, ensuring a consistent shower experience.
Maintenance
Regular maintenance will ensure the longevity and optimal performance of your Bristan shower valve.
Cleaning:
- Clean the chrome finish regularly with a soft cloth and warm soapy water.
- Do not use abrasive cleaners, scouring pads, or chemical cleaning agents, as these can damage the chrome finish.
- Rinse thoroughly after cleaning and dry with a soft cloth to prevent water spots.
Filter Maintenance:
The valve features easy-clean integral filters. If you notice a reduction in flow or performance, the filters may need cleaning.
- Turn off the main water supply to the valve.
- Remove the concealing plate and access the valve body.
- Carefully remove the integral filters.
- Rinse the filters under running water to remove any debris. For stubborn deposits, a soft brush may be used.
- Reinsert the clean filters, ensuring they are correctly seated.
- Reattach the concealing plate and turn on the water supply, checking for leaks.
Servicing:
For internal servicing or replacement of components like the thermostatic cartridge, it is recommended to contact a qualified plumber or Bristan customer support. The easy-access cover plate facilitates this process.
Troubleshooting
This section addresses common issues you might encounter with your shower valve.
| Problem | Possible Cause | Solution |
|---|---|---|
| Low water flow |
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| Inconsistent temperature / Water too hot or cold |
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| Valve dripping or not turning off completely |
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If the problem persists after attempting these solutions, please contact Bristan customer support or a qualified plumber.
Specifications
| Feature | Detail |
|---|---|
| Model Number | MINI2 TS1203 CL C |
| Brand | Bristan |
| Material | Brass |
| Exterior Finish | Chrome |
| Valve Type | Thermostatic Mixing Valve (TMV3) |
| Control Type | Single Sequential (Temperature and Flow) |
| Installation Type | Concealed |
| Maximum Operating Pressure | 8 Bars |
| Inlet Connection Type | Female Iron Pipe |
| Number of Ports | 2 |
| Item Dimensions (L x W x H) | 3.82 x 7.68 x 7.68 inches |
| Item Weight | 4.29 pounds |
| Inlet Centres | 99mm +/- 1mm |
| Specification Met | CE |
Warranty and Support
Bristan products are manufactured to the highest standards and are covered by a comprehensive warranty. For specific warranty details, including terms and conditions, please refer to the warranty card included with your product or visit the official Bristan website.
For technical assistance, spare parts, or to report an issue, please contact Bristan Customer Service. Have your model number (MINI2 TS1203 CL C) and date of purchase ready when contacting support.
Bristan Contact Information:
- Please refer to the official Bristan website or product packaging for the most current contact details.





