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www.level.org.nz
THE AUTHORITY ON SUSTAINABLE BUILDING
Inspection chamber with
internal open drain
(C) BRANZ 2009
concrete pipe diameter
o 450 mm for drains 100 mm or less
o 600 mm for drains over 100 mm
150 mm
removable lid at ground level must
prevent ingress of surface water
flexible joint within 225 mm of concrete surround
min. 150...
www.level.org.nz
THE AUTHORITY ON SUSTAINABLE BUILDING
Access chamber with
inspection point
(C) BRANZ 2009
concrete fill to inspection point level
concrete top
removable access lid at ground level
must prevent ingress of surface water
concrete pipe internal
diameter 1 m min.
ladder rungs as necessary
150 mm
greater than 1 m (cover level
to drain invert)
all joints
must be...
www.level.org.nz
THE AUTHORITY ON SUSTAINABLE BUILDING
Rodding point
(C) BRANZ 2009
225 mm pipe
for top section
flow
concrete surround to
removable cover
45? junction
1 m or less (invert
of drain in ground)
compacted fill surround
www.level.org.nz
THE AUTHORITY ON SUSTAINABLE BUILDING
Inspection chamber with
internal inspection point
(C) BRANZ 2009
concrete pipe diameter
o 450 mm for drains 100 mm or less
o 600 mm for drains over 100 mm
150 mm
removable lid at ground level must
prevent ingress of surface water
flexible joint within 225 mm of concrete surround
min. 150...
www.level.org.nz
THE AUTHORITY ON SUSTAINABLE BUILDING
Locations where access
points must be provided to
drains
(C) BRANZ 2009
immediately inside
the boundary
boundary
at every junction with:
o a branch drain connected to a soil fixture
o a branch drain longer than 2 m
at every change ingradient
more than 45o
at every change in horizontal...
www.level.org.nz
THE AUTHORITY ON SUSTAINABLE BUILDING
Backsiphonage
(C) BRANZ 2009
negative pressure supply siphonage through hose
(cross connection)
backflow
www.level.org.nz
THE AUTHORITY ON SUSTAINABLE BUILDING
Floor waste gully trap
(C) BRANZ 2009
total of four inlets
gully riser
floor
trap level
outlet
total depth for:
o 100 mm riser is approx. 290 mm
o 80 mm riser is 360 mm (check manufacturer)
ceiling