Electric Hot Water Repairs & Replacement, Gold Coast

Most electric hot water on the Gold Coast runs on an off-peak controlled-load tariff. Tariff 31 heats overnight only, so it needs a bigger tank; Tariff 33 is available for most of the day, so a smaller tank can keep up. Tariffs are set by your retailer on the Energex network. If your household has grown, or you've moved from Tariff 33 to Tariff 31, running out of hot water is often a sizing problem rather than a fault.

Most electric failures we see are either the tank itself (water at the base means the cylinder has rusted through and must be replaced) or the heating side: a failed element or thermostat. Elements and thermostats are electrical work, so we tell you when an electrician is needed and organise the electrical connection on replacements.

Coastal homes have one more factor. Every steel tank has a sacrificial anode that corrodes so the tank doesn't. Hard-working or neglected anodes run out, and salt air shortens the life of external fittings near the beach and the Broadwater. In townhouses and units, the tank is often in a cupboard or on a balcony, so we check access, drainage and the space before the day, and confirm the replacement will physically fit.

How an electric storage system works

An element heats water inside an insulated steel tank, controlled by a thermostat, and the tank stays at mains pressure so hot water reaches every tap. Most units are connected to an off-peak tariff so the element only runs during cheaper periods. Water heaters are designed to keep stored water at 60°C or above, which controls Legionella bacteria.

The relief valve: a drip can be normal

The temperature and pressure relief valve near the top of the tank lets out water as it expands during heating, so a small discharge while the unit heats is normal. A constant trickle or steady flow is not. It usually means the valve is worn, or the water pressure is too high and needs a pressure-limiting valve.

Manufacturers commonly recommend gently lifting the valve's easing lever every six months, and replacing the valve about every five years. If water keeps running after you let the lever go, or the valve hasn't been touched in years, it's worth having it looked at.

The anode protects your tank

Inside the tank is a sacrificial anode, a metal rod that corrodes so the tank doesn't. Once it's used up, the tank itself starts to rust. Many manufacturers suggest checking the anode around the five-year mark. Replacing it in time can add years to a tank that's otherwise sound.

Temperature and safety requirements

When a water heater is installed or replaced, hot water to bathroom outlets must be limited to 50°C to reduce the risk of scalds, which is usually done with a tempering valve. Kitchen and laundry outlets can run hotter. We fit or check the tempering valve on every replacement.

Replacement is notifiable work

In Queensland, replacing a water heater is notifiable work. The licensed plumber must lodge a notice with the Queensland Building and Construction Commission (QBCC) within 10 business days of finishing. You should receive a copy. It's a quick way to tell the work was done by a licensed plumber and recorded properly.

Electrical work is separate

Elements, thermostats and wiring are electrical work. A plumber handles the tank, valves and water connections. The electrical side must be done by a person with the appropriate electrical licence, and we'll tell you when that's needed.