23
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
Model
874W27
Hot water connection
R¾/20
Cold water connection
R¾/20
Gas inlet connection
R¾/20
T&PR Valve Drain
R¾/15
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.
A full flow gate valve or ball 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 20 and
to
“Mains Water Supply”
on page 19.
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.
Insulation used on the cold and hot water lines must
extend up to the cold water inlet and hot water
outlet of the water heater.
Note:
If an expansion control valve is required, refer to
diagram
on page 24 for an acceptable pipe work
arrangement.
Notes:
It is essential all pipe connections be correctly aligned, otherwise component connections within the
water heater may be strained and / or components themselves misaligned. It is recommended also,
wherever possible, pipe connections be made at the water heater first and final pipe runs be made in
soft copper pipe to allow some adjustment for misalignment.
Use the spanner flats on the water heater fittings and take care to avoid twisting the water inlet and
outlet pipes inside the jacket.
HOT
WATER
GAS
COCK
GAS
PRESSURE LIMITING
VALVE
GATE VALVE
OR
BALL VALVE
COLD WATER
POWER
CORD
T&PR
DRAIN
Gas Water Heater
Cold and Hot Water and Gas Connection Details
(without Expansion Control Valve)
