Specifications

STANDARD SPECIFICATION - BUILDINGS
DPI REFERENCE TEXT - APRIL 2009
PAGE 32
16.9 WASTEWATER
General
Standard To AS/NZS 3500.2 or AS/NZS 3500.5.
Materials: UPVC drainage pipes, type DWV.
Waterless composting toilets: To AS/NZS 1546.2
On site domestic wastewater treatment units: To
AS/NZS 1546.3.
Cleaning
During construction, use temporary covers to
openings and keep the system free of debris. On
completion, ush the system using water and leave
it clean.
Septic tanks
Precast concrete or glass bre reinforced plastic
septic tank: To AS/NZS 1546.1.
Efuent disposal: To AS/NZS 1547 and the
requirements of the Environmental Health Branch
of the Department of Health and Community
Services.
Vent pipes
Staying to roof: Do not penetrate the roof covering,
x the stays at roong screws.
Terminations: Provide bird-proof vent cowls made of
the same material and colour as the vent pipe.
16.10 FRESH WATER
Standards
General: To AS/NZS 3500.1 and AS/NZS 3500.5.
Tap positions
Locate hot tap to the left of, or above, the cold water
tap.
Accessories
Provide the accessories and ttings necessary for
the proper functioning of the plumbing systems,
including taps, valves, outlets, pressure and
temperature control devices, strainers, gauges and
pumps.
Water Heaters
Electric water heaters: To AS/NZS 4692.1
Minimum energy performance: To AS/NZS 4692.2
Gas hot water heaters: To AS 4552
Oil red heaters: To AS 1691.
Solid fuel heaters: To AS/NZS 2918.
Heater installation
Location: Locate water heaters where they can be
maintained or replaced without damaging adjacent
structures, xtures or nishes.
Solar water heater
Design and construction: To AS 2712.
Use a proprietary automatic water heater
comprising solar collector and storage container,
with supplementary heating unit, including the
connections, controls and ttings necessary for the
proper functioning of the system.
Manufacturer: Solahart 302L with 4 m
2
solar
collectors for houses and 180L with 2 m
2
solar
collectors for units. Use D models in corrosive
water areas.
Installation: To AS 2441. Provide swing out arms
where necessary.
16.12 GAS
Standard
General: To AS 5601 and AS/NZS 1596.
Installation
Install pipework in straight lines and uniform grades.
Keep the number of joints to a minimum. Prevent
direct contact between incompatible metals.
Conceal pipes where possible.
Accessories: Provide the accessories and ttings,
necessary for the proper functioning of the gas
system.
Buried pipes
Warning tape: During backlling, lay plastic warning
tape above and for the full length of buried gas
pipes.
Type: Minimum 100 mm wide, with “GAS PIPE
UNDER” marked continuously.
Certicate of appliance - Hold Point
Hold Point: Submit a certicate from the manufacturer
stating that the appliance meets with AGA/ALPGA
approval for operation with the type of gas to be
used.
Gas bottles
Provide 2 x 45 kg gas cylinders with a manual
change over valve. Locate where shown on the
drawings or as directed on a concrete pad.
16.11 FIRE HOSE REELS
Standard: To AS/NZS 1221.
Reel Type: Reel drum mounting bracket,
independent of the supply pipe.
Hose: 36 m hose with metal nozzle for jet and
spray.
Electric Water Heater
Provide and electric water heater wall mounted in
the position shown on the drawings or as directed.
Proprietary Item: Hardies Dux 50 litre. Model
HDE50V.
Temperature
Maximum temperature at ablution outlets: 50
o
C.
Maximum temperature at kitchen sinks and laundry
tubs: 60
0
C
Isolating valves
Provide isolation valves to water heaters.
Cleaning
On completion, ush the pipelines using water and
leave them clean.
Rainwater Tanks
Standards
Metal tanks and rainwater goods: To AS/NZS
2179.1
Design and Installation: To the recommendations of
SAA HB 230.
Polyethylene Tanks: AS/NZS 4766.
PLUMBING & DRAINAGE
Specifications March 2009.indd 32 11/03/2009 11:47:12 AM