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DRAINING THE WATER HEATER
To drain the water heater:
Switch off the electrical supply at the power outlet to the water heater.
Close the gas isolation valve at the inlet to the water heater.
Leave the cold water isolation valve open at the inlet to the water heater.
Open hot tap (preferably the shower outlet) for 20 seconds, to purge any hot water left in the water
heater.
Close the cold water isolation valve, and leave the hot tap remain opened.
Unscrew the two drain plugs, one each at the cold water inlet and transfer pipe connection, on the
underside of the water heater.
A portion of water will drain from the water heater.
In order to drain the remainder of water inside the water heater, raise the lever of the temperature
pressure relief valve. The easing lever on the valve is accessed by removing this plastic cover panel.
Refer to
“Accessing the Temperature Pressure Relief Valve”
on page 11.
When water stops flowing from the drain plugs, gently lower the lever of the temperature pressure relief
valve, refit the plastic cover panel and close the hot tap.
Note:
It is recommended not to screw the drain plugs back in, until the water heater is to be turned on again.
