8 DIY Repairs for Leaking Pipes
Leaking pipes are among the most disruptive plumbing problems because they waste water, increase bills, and can damage walls, floors, and cabinets. The good news is that many small, visible leaks can be stabilised with DIY methods—especially if you act fast and work safely. Below you’ll find eight practical repairs for minor pipe leaks, plus clear guidance on when it’s time to call a professional.
Need urgent help? Citywide offers rapid support. For local service, you can also book Plumbers in Hammersmith or Plumbers in Fulham.
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Tools and Safety Before You Start
Before attempting any fix, stop the water and protect your home from damage. Repairs work best when the surface is dry and pressure is released.
- Shut off water at the isolation valve or mains supply.
- Drain pressure by opening nearby taps.
- Dry the pipe so tape and putty can bond.
- Contain water with towels and a bucket.
- Stop if near electrics (sockets, wiring, boilers) and call a professional.
Handy tools: adjustable wrench, screwdrivers, PTFE tape, self-amalgamating tape, repair clamp/sleeve, sandpaper, cloths, bucket.
1) Apply PTFE (Plumber’s) Tape for Small Joint Leaks
Best for: light seepage at threaded joints and fittings.
- Turn off water and dry the fitting.
- If possible, undo the joint and clean threads.
- Wrap PTFE tape around the male threads (same direction as tightening).
- Reassemble, tighten firmly (don’t over-tighten), and test.
Important: PTFE tape won’t reliably seal cracks or holes—use a clamp, sleeve, putty, or replace the section.
2) Use a Pipe Repair Clamp
Best for: small holes or cracks on straight, accessible pipe runs.
- Shut off water and dry the area.
- Clean the pipe so the rubber gasket sits flat.
- Centre the clamp over the leak.
- Tighten evenly until the leak stops, then retest.
Tip: Use the correct clamp size for your pipe diameter to avoid gaps and repeat leaks.
3) Seal a Crack with Epoxy Putty
Best for: pinholes or small cracks where a clamp won’t fit well.
- Turn off water and dry the pipe completely.
- Roughen the surface with sandpaper for better adhesion.
- Knead putty until uniform, press firmly over the leak.
- Shape a thick layer around the area and let it cure fully.
- Restore water and check for drips.
Tip: Always follow the cure time on the product—turning water on too early can break the seal.
4) Fit a Pipe Repair Sleeve
Best for: wider cracks or areas needing broader coverage than a clamp.
- Isolate water and dry the pipe.
- Place the rubber sleeve over the damaged section.
- Secure with hose clamps (one at each end if provided).
- Turn water on slowly and inspect the seal.
Note: Sleeves are often temporary—plan a permanent fix for long-term reliability.
5) Seal with Self-Amalgamating Tape
Best for: awkward shapes, joints, and minor leaks where a clamp can’t sit flat.
- Turn off water and dry the surface.
- Stretch tape while wrapping tightly around the leak.
- Overlap each layer by about half and build multiple layers.
- Wait a few minutes for it to fuse, then test.
Key point: Stretching activates the seal—if you wrap loosely, it won’t fuse properly.
6) Tighten Loose Pipe Fittings
Best for: slow drips from accessible joints, especially compression fittings.
- Shut off water and place a towel underneath.
- Tighten the fitting slightly (quarter-turn) with a wrench.
- Restore water and check.
- If it still leaks, the internal olive/washer may need replacing.
Warning: Over-tightening can crack the fitting or strip threads, creating a worse leak.
7) Replace a Damaged Pipe Section
Best for: visible pipe damage on an exposed section you can safely access.
- Turn off mains water and drain the line.
- Cut out the damaged portion with a pipe cutter (straight cuts).
- Install a new section using push-fit or compression connectors.
- Turn water on slowly and inspect all joints.
Not sure? If you’re unsure about joining methods, call a professional to avoid repeat leaks.
8) Insulate Pipes to Prevent Freezing Leaks
Best for: preventing freeze cracks in lofts, garages, basements, and other unheated spaces.
- Identify exposed pipe runs and measure length and diameter.
- Fit foam insulation sleeves and tape the joins.
- Cover bends and valves—no exposed gaps.
- Check insulation before winter each year.
Prevention matters: Insulation lowers burst risk and can improve energy efficiency.
When to Call Citywide Plumbers
Call a professional if the leak is hidden behind walls or floors, the pipe is badly corroded, water is close to electrics, or the leak is connected to central heating. Repeated leaks often indicate underlying damage that needs proper diagnosis and a permanent repair.
For local coverage, book Hammersmith Plumbers or Plumbers in Fulham for fast help when you need it.
Contact Us
Call: 02038928545
Preventative Tips to Avoid Leaking Pipes
- Monitor pressure: high pressure stresses joints and seals—use a regulator if needed.
- Inspect regularly: check under sinks, around appliances, and visible joints for damp patches.
- Avoid harsh chemicals: frequent chemical use can weaken older pipework.
- Winterise: insulate exposed pipes and drain outside taps before freezing weather.
Conclusion
Many minor pipe leaks can be stabilised quickly with DIY methods, especially when the leak is accessible and you act early. Use these repairs to prevent water damage, then arrange a permanent solution if needed. For complex leaks, burst pipes, or hidden issues, Citywide Plumbers is ready to help with rapid response and expert repairs.
DAMP AND LEAK DETECTION SERVICES
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