Is Your Hot Water System Leaking? Signs, Causes & Fixes
A leaking hot water system is a common household issue that should never be ignored. Whether you’ve noticed water dripping from your water heater, a leak from the overflow pipe, or puddles forming around your system, these signs could indicate anything from high pressure buildup to a failing tank.
At Jaycee Plumbing, we’ve helped countless homeowners in Melbourne, Bendigo, and surrounding suburbs diagnose and fix leaking hot water systems. In this guide, we’ll break down the most common causes of leaks, how to troubleshoot them, and when to call a professional plumber.
Common Causes of a Leaking Hot Water System
1. Pressure Relief Valve Dripping
The temperature and pressure relief (TPR) valve is designed to release excess pressure in the system. A small, occasional drip is normal, but constant leaking means something is wrong.
Possible Causes:
✔ High pressure inside the tank
✔ A faulty pressure relief valve
✔ Sediment buildup blocking the valve
How to Fix It:
- Manually test the relief valve by gently lifting the lever and letting it snap back.
- Flush the system to remove sediment buildup.
- If the valve continues to drip excessively, it might need replacement.
🚨 If you’re unsure, call Jaycee Plumbing for assistance.
2. Hot Water System Leaking from the Overflow Pipe
If water is leaking from the overflow pipe, your system may be:
✔ Overheating, causing pressure buildup
✔ Experiencing an issue with the thermostat
✔ Affected by a faulty expansion control valve
How to Fix It:
- Check if the thermostat is set too high (60°C is standard).
- Inspect the overflow pipe for debris or blockages.
- If the leak persists, call Jaycee Plumbing to inspect the system.
3. Hot Water Tank Leaking from the Bottom
A hot water system leaking from the bottom is usually a serious issue that requires immediate attention.
Possible Causes:
✔ Internal corrosion (common in older tanks)
✔ A loose or damaged drain valve
✔ A cracked tank due to wear and tear
How to Fix It:
- Tighten the drain valve if it’s loose.
- If corrosion or a crack is the issue, a replacement system is the only solution.
💡 Gas hot water systems leaking from the bottom could indicate a burner issue—please contact Jaycee Plumbing if this occurs.
4. Water Leaking from the Top of the Hot Water System
Leaks from the top of the unit usually come from:
✔ Loose inlet or outlet connections
✔ A faulty pressure relief valve
✔ High water pressure stressing the system
How to Fix It:
- Use a wrench to tighten loose fittings.
- Inspect the hot water outlet and inlet valves for corrosion.
- If the leak continues, call Jaycee Plumbing for an inspection.
5. Rust and Corrosion in the Hot Water System
Over time, rust and sediment buildup can weaken the hot water tank, leading to leaks.
Signs of Corrosion:
✔ Rusty or brown water coming from your taps
✔ Visible rust spots on the tank
✔ A metallic taste in hot water
How to Fix It:
- If the tank is rusted, it needs to be replaced.
- Regular flushing of the system can help prevent sediment buildup.
🚨 Delaying replacement can lead to a burst hot water system—call Jaycee Plumbing if you see rust!
Is a Leaking Hot Water System Dangerous?
Yes! A leaking water heater poses risks such as:
🚨 Water damage to floors, walls, and nearby appliances.
🚨 Mould growth, which can affect air quality.
🚨 High energy bills from wasted hot water.
🚨 Gas leaks (if you have a gas hot water system).
If your hot water system is leaking, act fast before the damage gets worse.
When to Call a Plumber for a Leaking Hot Water System
DIY fixes can solve some minor leaks, but call Jaycee Plumbing if:
✔ The hot water system is leaking continuously.
✔ The pressure relief valve keeps dripping.
✔ There is rust on the tank.
✔ You suspect a gas leak.
✔ There is no hot water or fluctuating temperatures.
At Jaycee Plumbing, we provide hot water system repairs, replacements, and emergency plumbing services across Melbourne and Bendigo suburbs.
FAQs – Hot Water System Leaks Explained
1. Why is my hot water system leaking from the pressure relief valve?
It’s meant to release excess pressure, but constant dripping may indicate a faulty valve or high pressure buildup.
2. Can I fix a leaking hot water system myself?
You can try tightening loose connections or flushing the system, but if the issue continues, call Jaycee Plumbing in Bendigo.
3. How do I stop my water heater from leaking?
Check for loose fittings, faulty valves, or corrosion. If the tank itself is leaking, replacement is the only option.
4. Is a leaking hot water system an emergency?
Yes! If left untreated, it can cause flooding, gas leaks, or tank failure. Call Jaycee Plumbing immediately.
5. How much does it cost to fix a leaking hot water system in Melbourne?
Costs depend on the issue. Minor repairs (like replacing a valve) are affordable, while full system replacements cost more. Jaycee Plumbing can provide an estimate.
Need Help with a Leaking Hot Water System? Call Jaycee Plumbing Today!
A leaking hot water system is a problem that won’t fix itself. Whether it’s a minor drip or a major leak, Jaycee Plumbing is here to help.
📍 Servicing Melbourne, Bendigo, and surrounding suburbs
📞 Call Jaycee Plumbing for expert hot water system repairs today!
Fix your leaking hot water system before it causes bigger problems!
