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Safety of Electric Water Heaters

Daughter:
Hey mum, there's a story here about an electric water heater that exploded. I think it's the same model we have.
VO: The law requires that the installation, inspection and maintenance of any electric water heater must be carried out by a registered electrical worker and a licensed plumber.
Electrical worker: This shower type water heater shouldn't have an on/off valve. It might explode!
Electrical worker: Remember to switch off the water heater after using it. And make sure you get it checked and maintained regularly.
End Super: Enquiries: 1823
www.emsd.gov.hk
Electrical and Mechanical Services Department