How to Replace a Tap (UK DIY Guide)
Replacing a tap can instantly refresh a kitchen or bathroom. Most standard mixer or pillar taps can be replaced by a confident DIYer with basic tools.
This step-by-step UK guide explains how to replace a tap safely and avoid common plumbing mistakes.
Tools You’ll Need
- Adjustable spanner
- Basin wrench (tap spanner)
- Screwdriver
- Bucket
- Towels or cloths
- PTFE tape
Materials Required
- New tap
- Flexible tap connectors (if needed)
- Replacement washers
Step 1: Turn Off the Water Supply
Locate the isolation valves under the sink.
Turn clockwise to shut off.
If no isolation valves are fitted, turn off the main stopcock.
Turn the tap on to drain remaining water.
Step 2: Disconnect the Old Tap
Place a bucket underneath.
Use a spanner to disconnect the flexible hoses.
Loosen the retaining nut underneath the sink using a basin wrench.
Lift the tap out from above.
Step 3: Prepare the New Tap
Attach flexible connectors if not pre-fitted.
Apply PTFE tape to threaded connections where required.
Check washers are seated correctly.
Step 4: Install the New Tap
Insert the tap into the sink hole.
Align it correctly.
Secure the retaining nut underneath.
Tighten firmly but avoid overtightening.
Step 5: Reconnect the Water Supply
Reconnect hot and cold hoses.
Ensure hot connects to hot supply.
Tighten carefully.
Turn isolation valves back on slowly.
Step 6: Test for Leaks
Turn the tap on fully.
Check underneath for drips.
Run water for several minutes.
Tighten connections slightly if needed.
Common Mistakes to Avoid
- Forgetting to turn off the water supply
- Overtightening plastic connectors
- Mixing up hot and cold supplies
- Not checking washer placement
- Failing to test for leaks thoroughly
Small drips can cause long-term cabinet damage.
When to Call a Professional
You should seek professional help if:
- Pipes are corroded
- No isolation valves are fitted
- The tap base does not fit existing hole
- Pipework needs altering
- Leaks continue after installation
See our Tap Repair Cost Guide for typical UK pricing.