32
CONNECTIONS – PLUMBING
All plumbing work must be carried out by a qualified person and in compliance
with the Standard AS/NZS 3500.4 and all local codes and regulatory authority
requirements.
All gas work must be carried out by a qualified person and in compliance with
the Standard AS 5601 or AS/NZS 5601.1, as applicable under local
regulations, and all local codes and regulatory authority requirements.
CONNECTION SIZES
Hot water connection: Rp 3/4.
Cold water connection: Rp 3/4.
Relief valve connection: Rp 1/2.
Gas inlet: Rp 1/2.
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 fittings.
An isolation valve and non return
valve must be installed on the cold
water line to the water heater. An
acceptable arrangement is shown in
the diagram. Refer also to
“Hot
Water Delivery”
on page 28 and to
“Mains Water Supply”
on page 26.
A disconnection union must always
be provided at the cold water inlet
and hot water outlet on the water
heater to allow for disconnection of
the water heater.
PIPE SIZES
To achieve true mains pressure operation, the cold water line to the water
heater should be the same size or bigger than the hot water line from the water
heater. The pipe sizing for hot water supply systems should be carried out by
persons competent to do so, choosing the most suitable pipe size for each
individual application. Reference to the technical specifications of the water
heater and local regulatory authority requirements must be made.
cold water connection
