Replace Outside Tap: A DIY Guide
A constantly dripping garden tap is more than just an irritating noise. It’s a sign that something’s wrong, and leaving it can lead to wasted water and even damage to your brickwork. When you need to replace an outside tap, it’s best to get it sorted sooner rather than later.
A full replacement is often the smartest move, especially if you’re seeing persistent leaks, heavy rust, visible cracks from winter frosts, or a handle that just spins without doing anything.
Should You Repair or Replace Your Outside Tap?
Sometimes it can be tough to decide whether a quick fix is enough or if you need to fit a whole new tap. A lot of it comes down to the tap's age and the specific problem. For a minor, steady drip, the culprit is often just a worn-out internal washer, which is usually a simple fix. If that sounds like your issue, take a look at our guide on how to fix a leaking tap for the steps.
But if you’re facing something more serious, a repair might just be a temporary solution.
| Symptom | Likely Cause | Recommended Action |
|---|---|---|
| Constant, steady drip | Worn internal washer | Repair. This is usually a straightforward and cheap fix. |
| Significant rust or corrosion | Tap body is degrading | Replace. The metal is compromised and will likely fail again soon. |
| Visible crack in the tap body | Frost damage or physical impact | Replace. A cracked tap is beyond repair and risks a major leak. |
| Handle spins freely or is seized | Stripped spindle or internal mechanism failure | Replace. The internal parts are broken, making it unusable. |
| Leaks from the tap body itself | Pinhole leak or failed seal | Replace. This points to a failure of the main tap structure. |
Ultimately, if you're dealing with anything more than a simple drip, a replacement is the most reliable long-term solution. It's also a great opportunity to upgrade to a modern, frost-proof model for better protection against cold weather damage.
Gathering the Right Tools and Materials
Before you start, having everything you need within arm's reach makes the whole job go a lot smoother.
Here’s what you’ll want to have ready:
- Two adjustable spanners: One to hold the pipe steady and the other to turn and loosen the old tap. Trying to do it with just one is a recipe for a twisted or damaged pipe.
- A wire brush: Essential for cleaning the pipe threads. You need a clean surface for the new tap to seal properly.
- PTFE tape: Used to create a watertight seal. You'll wrap this around the threads of the new tap before fitting it.
- Your new tap: You’ll need a replacement, of course. For a helping hand, have a look at these tips for finding the right faucet for you.
Top Tip: Measure your pipe's diameter before you head to the shop to buy the new tap. It’s a simple check that can save you a very frustrating second trip.
A Practical Walkthrough to Replacing Your Tap
With your tools ready, it's time to get started. First, you must shut off the water supply to the tap. Find your main stopcock—usually under the kitchen sink or in a utility cupboard—and turn it clockwise fully.
Once that's done, open the old tap fully to let any trapped water drain out.
Safely Removing the Old Tap
To get the old tap off without causing damage, you'll need two adjustable spanners. Grip the pipe fitting behind the tap with one spanner to hold it steady. Then, use your second spanner on the tap's body and turn it anti-clockwise to loosen it.
Using two spanners prevents you from accidentally twisting the copper pipework inside your wall. This is a classic DIY mistake that can lead to a nasty leak and a bigger plumbing headache.
Fitting and Testing the New Tap
With the old tap removed, clean the pipe threads with a wire brush. Grab your PTFE tape and wrap it around the new tap's threads clockwise about 10–15 times to create a watertight seal.
Screw the new tap on by hand. Once it’s finger-tight, use your spanner for a final turn until it’s firm and pointing downwards. Be careful not to overtighten.
Finally, head back to your stopcock and turn the water back on very slowly. Check for any drips around the new joint. If it’s dry, congratulations—job done!
Troubleshooting Common DIY Issues
Hit a snag? It happens. Most problems are easy to sort out. If your new tap drips from the joint, the seal isn't watertight. The likely culprit is not using enough PTFE tape. Shut the water off again, unscrew the tap, and add several more wraps of tape before refitting.
Another common problem is an old tap that’s seized. A squirt of penetrating oil on the connection, left for ten minutes, can make all the difference. What if your new tap tightens up but doesn't sit straight? Adding or removing a layer or two of PTFE tape can help you adjust the final position.
Knowing When to Call a Professional
While replacing an outside tap can save money, it’s crucial to recognise when to stop. What starts as a simple job can spiral if you find corroded pipes or a seized shut-off valve. Forcing it could cause a major leak.
DIY vs Professional Replacement Cost Comparison
| Cost Item | DIY Estimate | Professional (Go Assist) Estimate |
|---|---|---|
| New Tap & Fittings | £10 - £40 | Included in Labour |
| Labour | Your time | £80 - £150 (for a standard replacement) |
| Total Estimated Cost | £10 - £40 | £80 - £150 |
The professional cost covers a guaranteed, leak-free installation without stress. If you're facing a complicated job or want peace of mind, our expert Go Assist plumbers are ready to help.
Frequently Asked Questions
Can I Replace My Standard Tap With a Frost-Proof One?
Absolutely, and it's a great upgrade. A frost-proof tap has its main valve seated deeper inside your wall, protecting it from freezing temperatures. The fitting process is nearly identical, but ensure the new tap's length is right for your wall thickness.
My New Tap Leaks From the Handle, What Did I Do Wrong?
This usually isn't your fault. It's likely the packing gland nut at the base of the handle has worked loose. To fix it, turn the water on and use a spanner to give this nut a gentle quarter-turn clockwise. This usually tightens the internal seal and stops the drip.
Is It Legal to Fit My Own Outside Tap in the UK?
It is perfectly legal for you to replace an existing outside tap on a like-for-like basis. However, if you're installing a brand-new tap, the Water Regulations require you to fit a double check valve to prevent contaminated water from flowing back into your mains supply.
If you run into a snag or would rather have the peace of mind that comes with a professional job, don’t hesitate to get an expert in. The team at Go Assist provides reliable, affordable plumbing services across the UK. You can book a trusted engineer online in minutes.
