Perth Summers Are Tough on Plumbing
With temperatures regularly hitting 35–42°C, Perth's summer heat creates unique challenges for residential plumbing systems. Here are the five most common issues and how to prevent them.
1. Burst Pipes from Ground Movement
Perth's sandy, clay-rich soil expands and contracts dramatically with temperature changes. This movement puts pressure on underground pipes, especially older galvanised or copper ones.
Prevention: Have a plumber inspect exposed pipes annually. If your home was built before 1990, consider asking about pipe relining or replacement options.
2. Hot Water System Overload
While you might think hot water systems get a break in summer, the opposite is true. Higher incoming water temperatures can cause pressure relief valves to discharge, and solar hot water systems can overheat.
Prevention: Set your hot water thermostat to 60°C (not higher). Check that the pressure relief valve isn't constantly dripping — a small drip on a hot day is normal, but continuous flow means it needs replacing.
3. Blocked Drains from Tree Roots
Trees search aggressively for water during Perth's dry summers. Root intrusion into sewer and stormwater pipes is the number one cause of blocked drains in Perth suburbs like Morley, Subiaco, and Fremantle where mature trees line the streets.
Prevention: If you have large trees within 5 metres of your sewer line, get a CCTV drain inspection every 2 years. It costs $150–$300 and can prevent a $3,000+ emergency dig-up.
4. Irrigation System Leaks
Perth's water restrictions mean every drop counts. Leaking retic systems waste thousands of litres and can cause foundation damage. Common failure points are solenoid valves and poly pipe joints that degrade in UV heat.
Prevention: Run each retic station manually at the start of summer and walk the garden looking for soggy patches, geysers, or dry zones. Replace any cracked or brittle poly pipe fittings.
5. Sewer Gas Smells
Floor drains, laundry wastes, and unused toilets in granny flats or spare bathrooms can dry out in summer heat. When the water trap evaporates, sewer gas enters your home — it's unpleasant and potentially harmful.
Prevention: Pour a bucket of water down every drain in your home once a month, including floor wastes in garages and laundries. This refills the water trap seal.
When to Call a Plumber
If you notice a sudden spike in your water bill, persistent damp patches in your yard, or low water pressure, don't wait. These are signs of an underground leak that will only get worse. Use our directory to find a licensed Perth plumber today.