How to fix a leaking water heater pressure relief valve

fix leaking water heater pressure relief valve
A temperature pressure relief valve is installed on storage water heaters on the side towards the top of the heater. This valve protects the water heater, by relieving pressure and allowing water to escape, as the water inside the cylinder expands due to heating. 

During normal water heater operation, a small volume of water may discharge from the valve during the heating cycle. This is normal operation and safe. However, if your water heater discharges more than a bucket full of water in 24 hours, there may be another problem

Problem: Continuous water dribbling from the pressure valve

A continuous dribble may indicate a small particle of foreign matter may be caught in the valve. Try gently raising the easing lever on the relief valve for a few seconds. This may dislodge any particles and clear the fault. Release the lever gently

Problem: Steady flow for long periods (often at night)

This may indicate the mains water pressure sometimes rises above the designed pressure of the relief valve. Ask your installing plumber to fit a pressure limiting valve.

Warning: Never replace the relief valve with one of a higher pressure rating.

Problem: Heavy flows of hot water until water heater is cold, then stops until the water reheats.

An electric water heater must be switched off at the switchboard. If you have a gas water heater, the gas control must be turned off using the knob on top of the gas control thermostat


Our trucks are on the road right now stocked with thousands of spare parts to repair and service your hot water heater quickly. Hot water is our business so you won’t have to wait weeks for parts to be ordered and to arrive.

Our team of licensed hot water plumbers are authorised and preferred service agents for all hot water brands including RheemDuxRinnaiAquamaxBoschConergyHockingApricusVulcanEdwards SolarSolahartEverhot and more.

Hot water is our business! At Cheapa Hot Water Sydney, we are licensed and qualified to undertake any plumbing and electrical work required to complete your hot water system installation or repair quickly, and within budget. Plumbers who do not specialise in the installation of hot water heaters may need to outsource the electrical work required to another tradesperson, thereby holding up your hot water system repair or installation, adding extra expense due to additional call-out fees charged by employing two tradespeople.

Additionally, most manufacturers won’t cover the terms of your hot water system warranty if it isn’t installed by a licensed hot water technician or a qualified plumber. Hot water tanks are an expensive appliance so why would you risk voiding your warranty by installing it yourself or employing the services of someone who isn’t licensed?

Save money by calling Cheapa Hot Water, the Sydney hot water repair specialists.

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Cheapa Hot Water – Sydney Hot Water Specialists

Hot water is our business. It is not merely a sideline to a plumbing business.

Hot water is our business!  Each year we install water heaters in thousands of homes and businesses across all Sydney suburbs.   We offer a fast hot water heater installation of all electric, gas and solar hot water systems. Ask about our same day service.
The benefits of using Cheapa Hot Water
  • Complete integrated solutions to all your hot water requirements.
  • Prompt, friendly, quality service at very competitive prices.
  • Our licensed tradespeople, in fully equipped trucks, will ensure that your hot water heater problems are quickly and efficiently resolved.
  • Hot water is our business and all work is carried out by our trained and qualified tradespeople.
  • We do not employ sub-contractors or outsource work to unskilled workers.
  • We offer competitive hot water system pricing and will beat any genuine quote TODAY!!
  • Free delivery on all new hot water heaters.
  • All work is carried out by our trained and qualified tradespeople.
  • We do not employ sub-contractors or outsource work to unskilled workers.

* Important: While our same day hot water installation service is often available, please be advised that it is dependent upon our availability on that day and the time of day you contact us. To check availability, please give us a call. We’re here to help and want all our customers back enjoying trouble-free hot water as soon as possible. 

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