Plumbing a Shower Mixer Tap: A Comprehensive Guide
Installing a shower mixer tap might seem like a daunting task, but with the right guidance and tools, it can be a rewarding DIY project. This step-by-step guide will walk you through the process, from gathering your materials to ensuring a perfect, leak-free finish.
Tools and Materials Needed
Before you start, ensure you have all the necessary tools and materials. Here's a list to help you prepare:
- Shower mixer tap
- Adjustable wrench
- Tape measure
- Pencil
- Drill and drill bit (if needed)
- Pipe cutter
- Teflon tape
- Pipe dope (optional)
- Rags or cloths
Understanding Your Plumbing System
Before you begin, it's crucial to understand your plumbing system. Most modern homes have a combination of hot and cold water supply pipes. The mixer tap will connect to these supplies and the waste pipe. If you're unsure about your system, consult a professional plumber.

Preparation: Measuring and Marking
Start by turning off the water supply to your shower. This is usually done at the isolation valve near the shower. Once the water is off, open the shower taps to relieve any remaining pressure.
Measure and mark the center point of the wall where the tap will be installed. The center point should be where the hot and cold water supply pipes meet. If you're replacing an existing tap, use this as a guide. If you're installing a new tap, ensure the center point is at a comfortable height for you.
Drilling Holes (if needed)
If your wall is made of concrete or brick, you'll need to drill holes for the tap's fixing bolts. Use a masonry drill bit and drill slowly and steadily to avoid cracking the wall. Once you've drilled the holes, use a wire brush to clean out any dust.

Installing the Tap
With the holes drilled, you can now install the tap. Start by inserting the fixing bolts through the wall and into the tap's mounting plate. Secure the plate to the wall using nuts and washers. Tighten the nuts by hand initially, then use an adjustable wrench to secure them.
Connecting the Water Supplies
With the tap secured, it's time to connect the water supplies. The tap should have two inlet connections, one for hot and one for cold water. Connect the hot water supply first, using Teflon tape on the threads to ensure a watertight seal. Tighten the connection by hand, then use an adjustable wrench to secure it. Repeat this process for the cold water supply.
Connecting the Waste Pipe
The waste pipe should connect to the bottom of the tap. Again, use Teflon tape on the threads to ensure a watertight seal. Tighten the connection by hand, then use an adjustable wrench to secure it. Some taps may require a rubber washer at this connection point.
Testing Your Work
With all the connections made, it's time to test your work. Slowly turn the water supply back on at the isolation valve. Check for any leaks around the tap's connections. If there are no leaks, you've successfully plumbed in your shower mixer tap!
Remember, if at any point you're unsure or encounter a problem, don't hesitate to consult a professional plumber. It's always better to be safe than sorry when dealing with plumbing issues.