AS NZS 3500 2 2 1996 amdt 1 1999 national plumbing and drain

Title

AS/NZS 3500.2.2-1996/Amdt 1-1999 National Plumbing and Drainage - Sanitary
plumbing and drainage-Acceptable solutions

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AS/NZS 3500.2.2/Amdt 1/1999-08-05

STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND
Amendment No. 1
to
AS/NZS 3500.2.2 — 1996
National Plumbing and Drainage
Part 2.2: Sanitary plumbing and drainage — Acceptable solutions
REVISED TEXT
The 1996 edition of AS/NZS 3500.2.2 is amended as follows; the amendments should be inserted in the
appropriate places.
SUMMARY : This Amendment applies to Clauses 1.3.1, 2.4.12, 2.4.13, 3.4.3, 3.10.3, 4.6.7.8, 4.6.8.1, 4.6.8.2,
4.7.1, 4.8.2, 4.9.1, 4.9.4, 5.4.2, 5.4.3, 6.2, 6.3.4.1, 6.4.2.1(d), 6.4.2.2, 7.5.2, 9.4.3, 9.13.10, 11.25.2, 11.27.4,

Figures 3.5, 4.3, 4.6, 6.1, 6.2, 6.5, and Appendices A and C.

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Published on 5 August 1999.
Approved for publication in New Zealand on behalf of the Standards Council of New Zealand.
AMDT
No. 1
AUG.
1999

Page 8 Clause 1.3.1

AMDT
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1999

Page 11 Clause 2.4.12 (New)

Delete ‘procedure’ and replace with ‘solution’.

Add the following new clause:
2.4.12 High density polyethylene (HDPE) The following limitations shall apply to
the use of high density polyethylene pipes and fittings:
(a)

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1999

For installation purposes —
(i)

the jointing of pipes and fittings, handling and general installation
requirements shall be in accordance with AS 2033 (or NZS/AS 2033) and
the manufacturers’ instructions;

(ii)

when passing through concrete footings, pipes and fittings shall be wrapped
with an impermeable flexible sheath of not less than 6 mm thick or as
specified by a structural engineer; and

(iii)

when fully encased in concrete structures, subject to the approval of a
structural engineer, pipes and fittings shall be installed in accordance with
the manufacturers installation instructions (see Clause 9.4.3).

Page 11 Clause 2.4.13 (New)
Add the following new clause:
2.4.13 Stainless steel pipes and fittings
use of stainless steel pipes and fittings:

The following limitations shall apply to the

(a)

Austenitic stainless steel pipes and fittings shall be Type 304, 304L, 316 or 316L
complying with ASTM A240/A240M.

(b)

The fabrication of fittings and assemblies, including bending, shall not be
permitted in the field.

(c)

Stainless steel drains to be installed below ground surface shall be Type 316.

ISBN 0 7337 2676 3


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1999

Page 16 Clause 3.4.3

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1999

Page 22 Clause 3.10.3

First line, delete 20°’ and replace with ‘20%’.

Delete existing clause and replace with the following:
3.10.3 Maximum length The maximum combined length of an unvented branch drain
and fixture discharge pipe (see Figure 3.5) shall be as follows:

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(a)

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1999

10 m from the vented drain to the weir of the fixture trap, provided that where the
discharge pipe size is smaller than the unvented drain size, the maximum length of
discharge pipe shall not exceed —
(i)

2 m, for water closet pans with DN80 outlets;

(ii)

1.5 m, for basins and bidets fitted with ‘s’ traps; and

(iii)

2.5 m, for all other fixtures.

(b)

10 m to the weir of a disconnector gully, or sullage dump point located in a
caravan park.

(c)

The unvented branch drain and fixture discharge pipe shall be installed in
accordance with Clauses 3.10.4, 3.10.5 and Figure 3.5.

Page 25 Figure 3.5
Delete ‘vanted’ and replace with ‘vented’.
Add ‘1.5 max.’ to vertical length only to ‘P-trap basin’.

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1999

Page 41 Clause 4.6.7.8

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1999

Page 42 Clause 4.6.8.1

Last line, delete ‘8.5 m’ and replace with ‘10 m’.

Add new Item (d), as follows:

(d)

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1999

A lockshield (shrouded) hose tap installed in the same room, and with a graded
floor.

Page 42 Clause 4.6.8.2
Delete existing clause and replace with the following:
4.6.8.2

Installation

The charge pipe shall be in the size range of DN6 to DN15.

(a)

Charge pipes from flushing devices, tap sets or hot water relief valve drains shall
not exceed 10 m in length.

(b)

Charge pipes from mechanical priming devices shall be installed in accordance
with the manufacturer’s installation instructions

NOTE: The charge pipe to the floor gully should be installed so as not to impede access for
maintenance.

AMDT
No. 1
AUG.
1999

Page 42 Clause 4.7.1
Delete existing clause and replace with the following:
4.7.1

Location

4.7.1.1 General The location of inspection openings in drains shall be in accordance
with Clauses 4.7.1.2 and 4.7.1.3.

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4.7.1.2 Australian requirements Except where inspection chambers are provided,
inspection openings for maintenance purposes (see Figure 4.4) shall be provided —
(a)

as close as practicable outside the building on each branch connecting one or more
water closets or slop hoppers but not greater than 2.5 m;

(b)

at each end of the straight section of a main drain and at intervals of not more than
30 m.

(c)

at the connection to the regulating authority’s sewer, if not provided by the
authority;

(d)

on the downstream end where any drain passes under a building except where
waste fixtures only are connected;

(e)

where any new section of drain is connected to an existing drain; and

(f)

immediately at or upstream of the upper bend of a jump-up.

4.7.1.3 New Zealand requirements Inspection openings or other means of access for
maintenance shall be provided in accordance with NZBC G13/AS2.
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1999

Page 42 Clause 4.8.2

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1999

Page 43 Figure 4.3

Add to the end of Clause 4.8.2 ‘or in New Zealand, with those given in
NZBC G13/A52.’

Item (a), delete ‘8.5 m’ and replace with 10.0 m.
Item (b), delete ‘DN6’.


AMDT
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1999

Page 46 Clause 4.9.1
Item (d), delete ‘pipes’ and replace with ‘drains’.
Add new Items (e), and (f), as follows:
(e)

Where an equal junction is used to make the connection of a branch drain the same
size as the main drain, the entry level of the branch drain may be on grade.

(f)

Junctions installed in the vertical plane shall not be used for the connection of
stacks.

Add new Clause 4.9.4 as follows:

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4.9.4 Junctions installed in vertical plane Sweep and oblique junctions are permitted
to be laid in the vertical plane for the connection of a single discharge pipe or a drain,
provided the vertical riser does not exceed 2 m in height, above the invert of the main
drain, and in accordance with the following:

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1999

(a)

Branch drains connected off the vertical riser shall be independently supported.

(b)

Where a vertical riser is to be extended to ground level and/or the distance between
the invert of the main drain and the invert of the branch drain exceeds 1 m,
concrete shall be used as follows:
(i)

For sweep junctions beneath the lower half of each junction to a minimum
thickness of 100 mm.

(ii)

For oblique junctions beneath the junction to a minimum thickness of

100 mm and continued up vertically to the underside of the bend fitted ot
the junction fitting.

Page 49 Figure 4.6
Delete Figure 4.6 and replace with new Figure 4.6.


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AMDT
No. 1
AUG.
1999

FIGURE 4.6

TYPICAL VERTICAL JUMP-UP FROM MAIN DRAIN
TO GRADED BRANCHES


AMDT
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1999

Page 51 Clause 5.4.2
Delete Item (a) and replace with the following:
(a)

Crushed rock or gravel screenings of nominal sizes 7–10 mm.

Add new Item (d), as follows:
(d)

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1999

Sand shall be free running, capable of passing through a 2 mm mesh sieve, and
shall not contain clay, organic or any other deleterious materials.

Page 51 Clause 5.4.3
Delete existing clause and replace with the following:

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5.4.3 Pipe side support and overlay materials Pipe sidesupport and pipe overlay
material shall not be inferior to pipe bedding material.
AMDT
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1999

Page 53 Clause 6.2

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1999

Page 55 Clause 6.3.4.1

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1999

Page 55 Clause 6.4.2.1(d)

Second paragraph, second last line, delete ‘Table 6.1’ and replace with ‘Appendix C’.

Item (b) delete ‘(domestic only)’.

Delete Item (d) and replace with the following:
(d)

AMDT
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AUG.
1999

The invert level of the trap or floor waste gully weir shall be a minimum of 10 mm
higher than the soffit of the graded discharge pipe to which it connects
(see Figure 6.2).

Page 56 Figure 6.1
Delete ‘1.0 max.’ and replace with ‘1.2 m max.’
Delete ‘Same type of waste fixture’ and replace with ‘Combination of waste fixtures.’

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1999

Page 56 Figure 6.2

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1999

Page 57 Clause 6.4.2.2

Add to dimension ‘10 mm min.’

First line, add after ‘connected’, ‘to comply with Clause 6.4.2.1(d),’.
Second last line, after the word ‘grade’, delete the rest of the sentence.

AMDT
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AUG.
1999

Page 62 Figure 6.5
For the left-hand drawing:
Delete ‘more’ and replace with ‘less’.
Delete Clause 6.6.1(a) and replace with Clause 6.6.1(b).

AMDT
No. 1
AUG.
1999

Page 67 Clause 7.5.2
Delete existing clause and replace with the following:
7.5.2 Topmost fixture connected to the stack Where the topmost discharge pipe
connected to the stack exceeds 6 m for combination pan rooms sinks (DN 100), slop
hoppers (DN 100), water closet pans (DN 100) and 2.5 m for all other fixtures, a trap
vent shall be connected in accordance with the requirement of Clauses 7.5.1(a) and (b).

AMDT
No. 1
AUG.
1999

Page 111 Clause 9.4.3
Delete existing clause and replace with the following:
9.4.3 Structural concrete or brickwork Piping shall not be installed in any structural
concrete slab, beam, column, concrete wall or load-bearing brickwork, unless approved
by a structural engineer.

AMDT
No. 1
AUG.
1999

Page 115 Clause 9.13.10 (New)
Add the following new clause:

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9.13.10 HDPE joints HDPE
manufacturers’ instructions.
AMDT
No. 1
AUG.
1999

joints

shall

be

installed

in

accordance

with

Page 125 Clause 11.25.2
Delete the first sentence of clause and replace with the following:
11.25.2 Wall-hung Wall-hung urinals other than those with an integral trap shall be
connected to a trap no smaller than DN40 or DN32 for New Zealand only.

AMDT

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AUG.
1999

Page 127 Clause 11.27.4
Delete existing clause and replace with the following:
11.27.4 Termination of discharge pipe
shall terminate —

AMDT
No. 1
AUG.
1999

The outlet from an untrapped floor drain

(a)

where it cannot cause damage or be a nuisance; and either

(b)

internally over a tundish connected to a floor waste gully, in accordance with
Table 4.4; or

(c)

externally with a flap and within 100 mm above ground level.

Page 130 Appendix A

Under AS, add the following:
2033

Installation of polyethylene pipe systems

Under AS, delete the following:
1260

Unplasticized PVC (UPVC) pipe and fittings for sewerage applications


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1999

Page 131 Appendix A
Under AS/NZS, add the following:
1260

PVC pipes and fittings for drain waste and vent applications

Under NZS/AS, add the following:
2033

Installation of polyethylene pipe systems

Under NZBC add the following:
G13/AS2

Foul water, Acceptable solution

Under ASTM add the following:
A240/A240M Heat-resisting chromium and chromium-nickel stainless steel plate, sheet
and strip for pressure vessels
AMDT
No. 1
AUG.
1999

Page 133 Appendix C
1 Fourth row BATH, DN40 trap and waste, third column, delete ‘3.5’ and replace with
‘6.0’.

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Fourth row BATH, DN50 trap and waste (NZ only), third column, add ‘3.5’.
2 Sixth row BIDETTE/BIDET, third column, add ‘Australia only’ DN32/40 trap and
waste, third column, delete ‘NP’ and replace with ‘3.5’.
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1999

Page 135 Appendix C

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1999

Page 136 Appendix C

First row URINALS (slab), DN100 grate and DN65 trap and waste, Columns 6, 7 and 8,
delete ‘2.5’, and replace with ‘6.0’.

First row WATER CLOSET PAN
Add under DN100 outlet,‘DN 80 outlet’, and, in Columns 2, 3, 4, 6, 7 and 8 the values
‘NP’, ‘NP’, ‘10.0’, ‘2.5’, ‘2.5’ and ‘2.5’.
‘DN 80 outlet (NZ only) and in Columns 2, 3, 4, 6, 7 and 8 the values ‘NP’, ‘NP’, ‘2.0’,
‘2.0’, ‘2.0’, and ‘2.0’.