Tempted to just hurl it onto the trailer and take it to the local tip? Before you give your system the literal boot, it’s worth knowing whether this annoying hot water system leaking situation can be salvaged – or whether it really is time for a replacement. So don’t fret just yet.
While some leaks are minor and easily fixed, others can be dangerous or signal major internal failure. So here’s your step-by-step guide to figuring out what to do with a leaking hot water system – including:
- When you can fix it yourself
- When to call a plumber
- And when it’s time to say bye-bye!
1. Turn off the water & power first
Water leaking from hot water system? Before anything else, make your system safe. If you’ve spotted a leaking hot water system, turn off the water supply at the isolation valve – usually located near the bottom of the unit. Then turn off the power supply:
Electric systems: Switch off at the breaker.
Gas systems: Turn the gas isolation valve off.
Solar systems: Turn off the booster switch and pump (if accessible).
This will prevent further water damage, scald risks, and electrical hazards.
2. Check where the leak is coming from
This is the most important step in diagnosing the problem. Don’t panic if you see hot water leaking – many systems have valves that release water during normal operation.
Here’s where to look when you have a hot water unit leaking:
Pressure relief valve (often located on the side): Drips here are expected now and then.
Bottom of the tank: Not a good sign – this usually means corrosion and internal tank failure.
Pipe joints: May just need tightening or resealing.
Top of the unit: Could be rain ingress. Hot water system leaking on roof? That makes top-of-the-unit leaks even more likely.
Near the wall: Check if the leak is running along the wall from elsewhere.
Take note: A hot water system leaking from pipe or the top of the unit may seem minor but can point to bigger issues.
3. Is it normal valve discharge – Or a bigger problem?
Most systems include a temperature and pressure relief valve (TPR) that releases water to prevent overheating. Occasional drips are fine. But steady streams or constant leaking? That’s not normal.
If your hot water service is leaking constantly from the relief valve or expansion valve, the valve might be worn out – or the system could be overheating due to a faulty thermostat or failed component.
4. What if the leak is on the roof?
If your hot water system is leaking on the roof, and you’ve got a solar setup, it’s likely coming from the solar collector or rooftop pipework.
A solar hot water system leaking may be the result of:
- Cracked collector panels
- Faulty pipe joins
- Pressure fluctuations
- Corrosion from age or weather.
This can affect performance and safety, so don’t ignore it. A leaking solar hot water system is definitely one to call a fully licensed plumber for – rooftop repairs need to be done safely and professionally.
5. Can I fix it myself?
There are a few DIY-safe fixes you can try:
Replace a valve (TPR or expansion valve): These are affordable parts and can be replaced with basic tools. Make sure to turn off water and power first, and perhaps check with a plumber or the warranty to see if you’re not violating any rules.
Tighten pipe fittings: If the water leaking from your hot water system is coming from a thread, try tightening the fitting gently with a spanner.
Flush sediment: If you hear gurgling or popping noises with minor leaks, sediment buildup may be affecting performance. Draining the tank and flushing it out could help.
DO NOT attempt repairs if:
- Water is leaking from the bottom of the tank
- There’s any sign of rust or bulging
- You have no plumbing or electrical experience
These situations definitely require licensed hot water repair or replacement.
6. When to call a professional plumber
Sometimes, the issue is minor – but it’s not safe to DIY. Call Static Plumbing if:
- The hot water unit is leaking near electrical components
- It’s a hot water system leaking from pipe joints you can’t safely access
- You’ve tried replacing a valve and it’s still leaking
- You’re not sure why your hot water system is leaking.
We’ll perform a proper inspection to rule out serious problems and offer affordable repairs or replacement quotes if needed.
7. When to replace the whole system
If your system is 8-15 years old and you’ve noticed frequent problems, it may be more cost-effective to replace it than keep repairing.
Red flags that mean it’s probably time to toss it:
- Water leaking from inside the tank
- Rusty or brown water from your taps
- Constant hot water running out
- Leaks that return even after repairs
- Visible corrosion or damage.
If you’re asking yourself ‘why is my hot water system leaking again after just getting it fixed?’ – your system might have already been on its last legs when it got that repair.
We can help you choose between gas, electric, or solar – and provide options that fit your budget and energy needs.
8. Don’t ignore it – Even small leaks can get expensive
A small leak can quickly become a major issue. Not only can it damage flooring, walls, and ceilings – but if it reaches electrical components or gas connections, it can become dangerous fast.
Plus, leaking systems cost more to run. You’re constantly:
- Losing hot water
- Wasting energy
- And potentially creating high water bills.
If your hot water system is leaking, act early.
9. Get expert advice – No pressure, no pushy sales
Not sure what’s really going on? That’s where we come in. At Static Plumbing, our fully licensed Brisbane and Sunshine Coast plumbers can inspect your system, explain what’s happening in plain language, and give you honest advice.
Whether your hot water unit is leaking, your valve needs replacing, or your old solar hot water system is leaking from the roof and needs an upgrade, we’ll give you upfront pricing and expert service.
Need help with a leaking hot water system?
Don’t wait until it floods your home or fails in the middle of winter. Whether your hot water system is leaking from the pipe, the tank, or even the roof, we’ve got the tools and experience to help – fast. Call Static Plumbing today to book a licensed plumber in Brisbane, Sunshine Coast, or Moreton Bay.
Hot water service leaking? We’ll give you an honest assessment, upfront quote, and same-day service where possible. Let’s get your hot water sorted.
