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Some quick checks and routine maintenance could have prevented the explosion of a storage water heater outside a home in Perth’s north, according to Building and Energy inspectors who attended the site.
The incident is a timely reminder for owners of all storage water heaters – gas, electric and solar – to follow the recommended maintenance schedule, which usually involves simple checks every few months.
Last month’s explosion split open the metal casing of the gas water heater outside a Yanchep former show home, which had recently been sold and occupied.
Inspectors believe the water supply’s high mineral content and infrequent use caused calcium to build up inside the unit, blocking the valves and preventing the thermostat from sensing the water temperature.
“This created a perfect storm where the water heater continued to heat up without the temperature safety controls kicking in, while the heated and pressurised water inside had nowhere to go,” Building Commissioner and Director of Energy Safety Ken Bowron said.
“Fortunately, no one was injured and incidents such as this are rare. However, it is a reminder of the potential dangers and how to prevent them through simple checks, such as opening the valves for a few seconds every six months.
“We advise home owners to follow the maintenance instructions provided by the manufacturer, and contact a licensed plumbing contractor if they have any concerns.”
Tips for checking your storage water heater (also see diagram)
Check the owner’s manual for instructions on your particular system. Common maintenance recommendations include:
Note: Building and Energy (a division within the Department of Mines, Industry Regulation and Safety) was formed in January 2018 by the amalgamation of the Building Commission and EnergySafety. Building and Energy oversees the WA regulation of building, painting, building surveying and plumbing services, and is responsible for the technical safety regulation of all electrical and most gas industries.
Sarah Roberts – 0466 409 828 or firstname.lastname@example.org