29
CONNECTIONS – PLUMBING
All plumbing work must be carried out by a qualified person and in accordance with the Standard
AS/NZS 3500.4 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
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 an approved thread sealant such as
Teflon tape on all sealing threads.
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
page 24.
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. This water heater is
intended to be permanently connected to the water mains
and not connected by a hose set.
This water heater has either a plastic dip tube or fitting liner in the inlet
and outlet fittings (see diagram). These must be in place for the water
heater to function properly. Do not remove or damage them by using
heat nearby. They will be pushed into the correct position as the fitting
is screwed in.
This water heater is intended to be permanently connected to the water
mains and not connected by a hose-set. A braided flexible hose or
semi-flexible connector may be used for connection to the water
heater, where permitted by AS/NZS 3500.4.
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.
