Plumbing in a Thermostatic Mixer Shower: A Comprehensive Guide
Installing a thermostatic mixer shower can be a rewarding DIY project that enhances your bathroom's functionality and safety. This guide will walk you through the process, from understanding the components to connecting the shower to your plumbing system.
Understanding Thermostatic Mixer Showers
Thermostatic mixer showers blend hot and cold water to provide a consistent temperature, protecting you from sudden changes due to other water usage in your home. They typically consist of a valve body, temperature control knob, flow control lever, and an outlet for the showerhead.
Tools and Materials Needed
- Thermostatic mixer shower unit
- Copper pipe (15mm and 22mm)
- Compression fittings (olives, nuts, and rings)
- Pipe cutter or hacksaw
- Adjustable wrench
- Tape measure
- Silicone sealant
- Towel or cloth
Preparation and Planning
Before you start, ensure you have the correct shower unit for your plumbing system (combi boiler, regular boiler, or mains pressure). Measure the distance from your existing pipework to the desired shower position, and choose a shower unit with suitable connections.
Isolating the Water Supply
Turn off the water supply to your bathroom at the stopcock. Open all hot and cold taps to relieve any remaining pressure in the system.
Removing the Old Shower Valve (if applicable)
If you're replacing an existing shower, turn off the isolating valves and disconnect the water supply pipes. Unscrew the old valve from the wall, using an adjustable wrench if necessary.
Installing the Thermostatic Mixer Shower Valve
Marking and Cutting the Pipework
Mark the center of the shower valve on the wall and use a spirit level to ensure it's straight. Cut the copper pipe to the required length, using a pipe cutter or hacksaw. Ensure the pipe ends are smooth and deburr them if necessary.
Connecting the Shower Valve
| Pipe Size | Fitting |
|---|---|
| 15mm | Compression fitting (olive, nut, and ring) |
| 22mm | Compression fitting (olive, nut, and ring) |
Connect the hot and cold water supply pipes to the shower valve using compression fittings. Tighten the nuts securely, but be careful not to over-tighten and damage the fittings.
Securing the Shower Valve
Secure the shower valve to the wall using the fixing screws provided. Ensure it's level and flush with the wall surface. Apply silicone sealant around the valve to prevent water ingress.
Connecting the Showerhead
Connect the showerhead to the outlet on the shower valve, following the manufacturer's instructions. Ensure it's secure but not over-tightened.
Testing the Shower
Turn the water supply back on at the stopcock. Slowly open the hot and cold taps in your bathroom to check for any leaks. Once you're satisfied that there are no leaks, test the shower by turning the temperature and flow control knobs.
Congratulations! You've successfully plumbed in a thermostatic mixer shower. Regularly maintain your shower by cleaning the showerhead and checking for leaks to ensure its longevity and optimal performance.
