15
CONNECTIONS – PLUMBING
IMPORTANT: When installing a new water heater to an old or existing system, it is a requirement that the system
and its equipment be thoroughly inspected and if necessary, drained and flushed with clean fresh water, before the
new water heater is connected. Failure to do this may cause blockages and/or damage to the water heater which is
not covered by warranty.
IF THERE IS ANY DOUBT ABOUT THE SYSTEM, DRAIN AND FLUSH AS A PRECAUTION.
CONNECTION SIZES
All plumbing work must be carried out by a qualified person and in accordance with the National Plumbing
Standard AS/NZS 3500.4 and local authority requirements.
All gas work must be carried out by a qualified person and in accordance with the Australian Gas Installations
Standard AS 5601 or AS/NZS 5601.1, AS3814 and local authority requirements.
WATER INLET AND OUTLET
All pipe work must be cleared of foreign matter before connection and purged before attempting to operate the
water heater. All olive compression fittings must use brass or copper olives. Use thread sealing tape or approved
thread sealant on all other fittings.
An isolation valve and non return valve must be installed on
the cold water line to the water heating system. An
acceptable arrangement is shown in the diagram opposite
for a water heating application.
A disconnection union must always be provided at the inlet
and outlet on the water heater to allow for disconnection of
the water heater.
Do not reduce the pipe work size and water heater water
connections without allowing for friction loss which will occur.
Low water flow will cause damage to the water heater and
system components.
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