At Swish Plumbing, we’ve seen our fair share of leaking pipes—and we know how quickly a small drip can turn into costly water damage, mould growth, and rising bills. The good news is, many minor leaks can be fixed with the right know-how.
By understanding what causes leaks and knowing how to spot the signs early, you can often tackle the problem before it gets worse. Whether you’re handling a quick DIY repair or need professional support, here’s how to get that leak sorted.
Common Causes of a Leaking Pipe
Understanding why pipes leak in the first place can help you not only fix the issue but also prevent it from happening again. Here are the most common culprits:
1. Corrosion and Age
Over time, pipes naturally deteriorate, especially in older homes. Corrosion from minerals in the water, rust, or general wear and tear can create small cracks or holes.
2. High Water Pressure
While strong water pressure feels great in the shower, it can put stress on your pipes, causing them to weaken or burst over time. If your pipes are rattling or banging when the water is turned on, high pressure could be to blame.
3. Temperature Fluctuations
Sudden changes in temperature—such as freezing conditions in winter—can cause pipes to expand and contract. Over time, this weakens the material, leading to cracks and leaks.
4. Poor Installation or Faulty Seals
If pipes weren’t installed correctly, or if the joints and seals weren’t secured properly, leaks can develop at weak points. Even a small misalignment can lead to significant water wastage.
5. Clogs and Blockages
A blocked drain or pipe doesn’t just cause slow drainage—it can create pressure buildup that forces water to escape through weak spots, leading to leaks.
6. External Damage
Tree roots, construction work, or even DIY mishaps (like drilling into a pipe by accident) can lead to unexpected leaks.
How to Identify a Leaky Pipe
Sometimes leaks are obvious, but other times they’re hidden behind walls or underground. Here’s how to spot the warning signs before they cause serious damage:
- Visible Water Stains – Brown or yellow marks on ceilings, walls, or floors indicate a leak behind the surface.
- Mould or Mildew – Persistent dampness from a leaking pipe creates the perfect environment for mould growth.
- Musty Smells – A constant damp, musty smell can signal hidden water leaks.
- Increased Water Bills – A sudden spike in your water bill without increased usage suggests water is escaping somewhere.
- Low Water Pressure – If your taps or shower suddenly lose pressure, it could be due to a leak in the plumbing system.
- Running Water Sounds – If you hear running water when all taps are off, you may have a hidden leak.
- Damp or Soft Patches in the Garden – If the soil is always wet, especially in dry weather, it could mean an underground pipe is leaking.
Step-by-Step Guide to Fixing a Leaking Pipe
If you’ve identified a leak, you can try a quick fix before calling in the professionals. Follow these steps:
Step 1: Turn Off the Water Supply
Before you do anything, shut off the main water supply to avoid further water damage. The shut-off valve is usually located near the water meter or under the sink for individual fixtures.
Step 2: Drain the Pipes
Turn on the taps to drain any remaining water in the pipes. This will prevent water from spraying everywhere when you start repairs.
Step 3: Identify the Leak
Locate the exact spot of the leak. If it’s a visible crack, joint, or pinhole, you can attempt a temporary fix. If the leak is hidden behind walls or underground, you may need a professional plumber.
Step 4: Choose the Right Repair Method
We highly recommend not doing this yourself, even a small leak can lead to a large damage bill! Here are some tips to do a temporary repair until a plumber can arrive (the same goes with cracked pipes).
For small leaks or pinholes:
- Pipe Repair Tape – Wrap self-fusing silicone tape tightly around the leak to create a watertight seal.
- Epoxy Putty – Mouldable putty that hardens around the pipe, sealing the leak temporarily.
For leaks at joints:
- Tighten the Fittings – Use a wrench to gently tighten any loose pipe connections.
- Apply Pipe Sealant – Plumber’s tape (Teflon tape) can help create a tighter seal on threaded joints.
For cracked pipes:
- Pipe Repair Clamp – A rubber-lined clamp that wraps around the pipe, sealing the crack.
- Pipe Replacement – If the crack is large, you’ll need to replace that section of pipe.
Step 5: Turn the Water Back On & Test
Once you’ve made the repair, slowly turn the water back on and check for leaks. If water is still escaping, the repair may not have worked, and you might need professional help.
When to Call a Professional Plumber
While minor leaks can often be handled with DIY solutions, some situations require expert intervention. Call a plumber if:
- The leak is behind walls or underground, and you can’t locate the source.
- Water damage is severe, with mould or structural issues appearing.
- The pipe is significantly corroded or has multiple weak points.
- You’ve tried DIY fixes, but the leak keeps returning.
- The leak is affecting your hot water system, as repairs may involve gas lines.
- The leak is causing a major water pressure drop in your home.
A licensed plumber will have the tools and expertise to properly diagnose and repair leaks, ensuring your plumbing system remains in top shape.
Preventing Future Pipe Leaks
A few simple maintenance steps can help prevent leaks before they happen:
- Monitor Water Pressure – Keep your water pressure between 40-60 psi to reduce stress on your pipes.
- Check for Corrosion – Inspect visible pipes for rust, greenish-blue deposits, or thinning material.
- Insulate Pipes in Cold Areas – Prevent freezing and cracking during winter months.
- Avoid Chemical Drain Cleaners – Harsh chemicals can corrode pipes over time.
- Be Careful When Drilling into Walls – Use a pipe detector before drilling to avoid puncturing pipes.
- Regularly Check Seals & Connections – Ensure fittings are tight and free from signs of wear.
- Upgrade Old Plumbing – If your pipes are decades old, consider replacing them with modern, durable materials.
Don’t Let a Leak Drain Your Wallet
A leaking pipe might seem like a minor inconvenience, but if left unchecked, it can lead to bigger—and costlier—problems. Whether it’s a quick DIY fix or a job for the pros, acting fast can save you money and protect your home from damage.
If you’re dealing with a stubborn leak or need professional advice, Swish Plumbing is here to help. We provide expert leak detection, repairs, and long-term solutions to keep your home’s plumbing in top condition.
Need a plumber? Call Swish Plumbing on 0402 547 293 today, and let’s get that leak sorted.
