Hot water heater pressure relief valve repair and replacement

hot water heater pressure relief valve replacement

How does the pressure relief valve in a hot water system work?

The pressure relief valve in a hot water heater is a safety device that prevents the tank from rupturing or exploding due to excessive pressure build up.

The pressure relief valve works by opening and releasing water from the tank when the pressure inside the tank exceeds a certain level.  This level is usually around 150psi however can vary depending upon the model and age of the hot water heater. If the pressure inside the hot water heater gets too high, the pressure relief valve opens, allowing water to flow out of the pipe and away from the tank.  The pressure inside the tank is relieved.

When the pressure relief valve fails or becomes faulty, it won’t open, causing the pressure inside the hot water heater to get too high. This can be very dangerous.

It is important that homeowners and businesses regularly inspect the pressure relief valve on their hot water heater to ensure it is functioning properly. The pressure relief valve is usually located on the top or side of the hot water system and is connected to a pipe.

Hot water heater pressure relief valve repair and replacement service

If you’re not confident to do this yourself, we recommend you contact our friendly team to organise a service call-out. We recommend all hot water systems be serviced every 5 years. If you supply our hot water service technicians with the make and model of your water heater, we will be able to determine whether a service call is required.

Book a hot water heater service

To organise a service for your hot water system, contact our friendly team. We offer fast service to all Sydney suburbs. Once onsite, we can check the pressure relief valve and other important parts of your hot water system are operating as they should.  Our trucks carry thousands of replacement parts and can fix problems on the spot.


Have you been told by a plumber or hot water company that your hot water system needs to be replaced – at a considerable cost? If so, contact the hot water specialists here at Cheapa Hot Water for advice. Over the years we have saved countless customers thousands of dollars by undertaking cost-effective repairs to faulty hot water heaters when they had been told they couldn’t be fixed.  Don’t believe us? We can put you in touch with these customers for verification.  A phone call to Cheapa Hot Water may save you thousands! Call 0410 693 532 to speak to a hot water specialist now.

Further reading

cheapa hot water sydney

Cheapa Hot Water Sydney

Hot water is our business – it’s not a sideline. Each year we repair and install hundreds of hot water systems in homes and businesses across Sydney.

  • We offer free delivery of your new hot water system and complimentary disposal and recycling of your old water heater.
  • As one of Sydney’s largest hot water system suppliers, our enormous buying powers and ability to buy direct from the manufacturer means we can pass attractive savings on to our customers.
  • Our fully qualified, licensed hot water heater installers have over 25+ years of experience each. We are fully insured and pride ourselves on our old-fashioned customer service.
  • We are accredited service agents for all the hot water heater brands including RheemDux, Rinnai, Aquamax, Bosch, ConergyHockingApricusVulcanEdwards SolarSolahart, Everhot and more.
  • We are qualified to undertake all the plumbing and electrical work required to install a new hot water system. There is no need to waste time and money employing multiple trades.
  • We have all the equipment needed to install your hot water system today. We don’t have to hire or wait for other trades to arrive with the required equipment.

Save time and money by employing a local hot water expert

Did you know that often the repair and installation of a hot water system requires the expertise and qualifications of both a licensed plumber and a licensed electrician?

We are qualified to undertake any plumbing and electrical work required to ensure your hot water heater is repaired 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.

Your hot water heater is an expensive appliance. Don’t risk voiding your warranty.

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?

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A faulty valve can lead to dangerous pressure buildup in the tank. If you notice any signs of leaks or if the valve fails to open when the pressure inside the tank gets too high, it is important to contact a licensed plumber or hot water heater technician to repair or replace the valve.