How to Prevent Burst Pipes in Melbourne’s Freezing Weather
Melbourne winters can be brutal, and freezing temperatures put your plumbing at serious risk. When water inside pipes freezes and expands, the pressure buildup can cause pipes to burst — leading to significant water damage and costly emergency repairs. Here’s how to protect your home before it happens.
Read on for essential tips on preventing burst pipes in Melbourne’s cold winters. We also cover a common but overlooked issue: frost valves on solar panels failing in cold weather.
Why Do Pipes Burst in Freezing Weather?
When the temperature drops, the water inside your pipes can freeze and expand. This is because when water freezes, its molecules change structure and end up taking up more space than they do in liquid form.
As the ice expands, it forces liquid towards your closed faucet, creating a significant buildup of water pressure between the ice blockage and the faucet. This pressure eventually causes the pipe to burst — typically in an area with minimal or no ice formation.
Pipes most susceptible to bursting are those exposed to the elements: pipes outside of building insulation, or in unheated areas like garages, basements, attics, and crawl spaces.
A burst pipe can mean no water supply, water leaks, and major property damage. In Melbourne’s south-east — including Berwick, Narre Warren, and surrounding suburbs — our team regularly responds to burst pipe emergencies during winter cold snaps.
At What Temperature Do Pipes Freeze in Australia?
This varies depending on your pipes and how old they are. In general, pipes are at risk of freezing when temperatures fall close to or below 0°C. Melbourne regularly drops below freezing overnight during winter, particularly in outer south-east and eastern suburbs.
The question is: what can you do right now to protect your pipes before the next cold snap hits?
How to Prevent Burst Pipes in Winter
- Locate Your Water Meter: Your water meter is typically located at the front of your property. In freezing conditions, knowing where it is — and being able to turn it off quickly â can prevent serious damage.
- Turn Off the Water Meter: To turn off the water meter, locate the shut-off valve and turn it to the off position. This stops the flow of water into your home and reduces the risk of frozen pipes — especially useful if you’re heading away on holidays.
- Call Jet Plus Plumbing: If you notice any signs of a burst pipe, contact Jet Plus Plumbing immediately on 0421 725 624. Our team is available 24/7 for plumbing emergencies across Melbourne.
Frost Valves on Solar Panels
Moving away from frozen pipes for a moment, let’s talk about frost valves on solar panels. As almost 3 million households across Australia have solar energy installed, this is a common issue during Melbourne winters that’s worth knowing about.
Frost valves are designed to protect your solar hot water system from freezing temperatures. When your roof temperature drops to around 4°C, these valves automatically open to allow water to drain and be replaced with warmer water from inside the system. Without this mechanism, the water would freeze — just like in your pipes.
While this is great technology, things can go wrong. During extremely cold weather, solar panel frost valves may fail or get stuck, leading to water running continuously into gutters from roof panels.
So, what do you do if you suspect your solar panel frost valves are failing?
Addressing Frost Valve Failures
1. Check for Water Leaks: Inspect your solar panels and gutters for any signs of water leaks. If you notice water running into the gutters from the roof panels, it could indicate a failed frost valve.
2. Turn Off the Isolation Valve for Your Hot Water Unit: To prevent further water damage, turn off the isolation valve for your hot water unit. This valve is usually located near the hot water unit and can be turned off by rotating the valve handle.
3. Call us straight away! If you suspect a frost valve failure, contact Jet Plus Plumbing on 0421 725 624. Our experienced technicians can quickly diagnose the issue and carry out repairs before further damage occurs.
More Tips for Preventing Burst Pipes
Here are some additional practical measures to help prevent burst pipes during Melbourne’s cold winter months. These are good habits to build regardless of the forecast.
- Insulate Your Pipes: Wrap exposed pipes in insulation material to keep them warm and prevent freezing — especially pipes in unheated areas like garages or crawl spaces.
- Keep a Steady Temperature: Maintain a consistent temperature in your home, even overnight or when you’re away, to prevent pipes from freezing.
- Open Cabinet Doors: Open cabinet doors under sinks to allow warm air to circulate around the pipes during cold snaps.
- Let Faucets Drip: During extreme cold, let your faucets drip slightly to keep water moving and reduce the chance of freezing.
- Turn Off Your Water if Going Away: If you’re heading away during winter, turn off the water at the meter as a precaution against burst pipes while the house is empty.
Stay Ahead of Melbourne’s Winter — Protect Your Plumbing Now
Melbourne winters hit hard — and burst pipes can cause thousands of dollars in damage. Take these steps before the cold arrives: turn off your meter when going away, check your solar panel frost valves, insulate exposed pipes, and know who to call when something goes wrong.
For any plumbing emergency, Jet Plus Plumbing is available 24/7. Call 0421 725 624 or visit our Emergency Plumbing Services page for fast help across Melbourne’s south-east.
Stay safe and prepared this winter. If you need any assistance, contact us today!
Further reading: How to Prevent Burst Flexi Hoses
