NCC 2019 Volume Three
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Section C Sanitary plumbing and drainage systems

Section C Sanitary plumbing and drainage systems

Part C1 Sanitary plumbing systems

Delete Introduction to this Part and insert Vic Introduction to this Part as follows:

Vic Introduction to this Part

Vic Introduction to this Part

This Part sets out the requirements for the design, construction, installation replacement, repair, alteration and maintenance of any part of a sanitary plumbing system including from sanitary fixtures and appliances to an approved disposal system.

Delete C1.3(1) and insert Vic C1.3(1) as follows:

Vic C1.3 General requirements

(1)

The design, construction, installation, replacement, repair, alteration and maintenance of a sanitary plumbing system must be in accordance with the following:

(a)

AS/NZS 3500.2, including the following variations and additions:

(i)

After clause 13.9(b), delete the following: Where a bath trap is not accessible, the bath shall discharge untrapped to a floor waste gully (FWG) in accordance with Table 4.6.7.2 and Appendix B.

(ii)

After clause 15.1, insert 15.1(A) as follows:

15.1(A)

When tested, the respective sections of any soil pipe, waste pipe, vent pipe or above-ground drain must be free of leaks when subjected to an air test in accordance with clause 15.3; and

(iii)

Substitute clause 15.3.3 as follows:

15.3.3

When tested, the respective sections of any soil pipe, waste pipe, vent pipe or above ground drain must be free of leaks when subjected to an air test in accordance with clause 15.3.2 over the minimum test duration specified in Table 15.3.2.

Part C2 Sanitary drainage systems

Delete Introduction to this Part and insert Vic Introduction to this Part as follows:

Vic Introduction to this Part

Vic Introduction to this Part

This Part sets out the requirements for the design, construction, installation replacement, repair, alteration and maintenance of any part of a sanitary drainage system including from sanitary fixtures and appliances to an approved disposal system.

After CP2.1 insert Vic CP2.101 as follows:

Vic CP2.101 No point of connection

Where a point of connection to a Network Utility Operator's sewerage system is not available, an on-site wastewater management system must be designed, installed and maintained in accordance with the requirements and agreement of the relevant authority having jurisdiction.

Delete CV2.1 and insert Vic CV2.1 as follows:

Vic CV2.1 Flow rate, liquid-to-air ratio and pressure testing

(1)

Compliance with CP2.1(2)(a) is achieved if the sanitary drainage system passes one or more of the pressure tests set out in Section 15 of AS/NZS 3500.2 and is designed to operate with—

(a)

a liquid to air ratio of between 1:1 and 0.65:0.35; and

(b)

A minimum flow rate of 0.8 m/s; and

(c)

A maximum flow rate of—

(i)

2 m/s under normal operating conditions; and

(ii)

3.5 m/s under surge conditions.

Delete CV2.2 and insert Vic CV2.2 as follows:

Vic CV2.2 * * * * *

Explanatory information

This clause has deliberately been left blank.

Delete C2.4(1) and insert Vic C2.4(1) as follows:

Vic C2.4 General requirements

(1)

The design, construction, installation, replacement, repair, alteration additions and maintenance of a sanitary drainage system must be in accordance with the following:

(a)

AS/NZS 3500.2, including the following variations and additions:

(i)

Substitute clause 5.3(c) as follows:

5.3(c)

under all bends greater than DN 65 forming risers from the drain.

(ii)

After clause 15.1, insert 15.1(A) as follows:

15.1(A)

Testing of a sanitary drainage installation—

(a)

if installed at a property provided with non-drinking water by the Network Utility Operator, may be carried out in accordance with—

(i)

a water test using non-drinking water provided by the Network Utility Operator in accordance with clause 15.2; or

(ii)

an air test in accordance with clause 15.3; or

(iii)

a vacuum test in accordance with clause 15.4; or

(b)

in cases other than in (a), testing may be carried out by way of—

(i)

an air test in accordance with clause 15.3; or

(ii)

a vacuum test in accordance with clause 15.4.

(iii)

After clause 5.4.2(d) of AS/NZS 3500.2, insert (d) as follows:

(d)

Free running sand, excavated from the trench, capable of passing through a 2 mm mesh sieve, which does not contain clay, organic or any other deleterious materials, where used in permeable soil conditions where ground water or surface water entering the trench does not disturb the sand.

After C2.4(1) insert Vic C2.4(2), (3), (4) and (5) as follows:

(2)

If an inspection shaft or boundary trap riser in a below ground sanitary drainage system is located clear of a building and is not likely to be damaged by vehicular traffic, a light cover must be installed in accordance with clause 4.4.2.1(a) and clause 4.4.2.1(c)(ii) and (iii) of AS/NZS 3500.2.

(3)

Discharge pipes measuring DN 50 or smaller must not be installed in a below ground sanitary drainage system, except for discharge pipes connected to floor waste gullies.

(4)

Risers from gullies shall be installed vertically with no offsets.

(5)

Where there is no point of connection to a Network Utility Operator's sewerage system, the design, construction, installation, replacement, repair, alteration and maintenance of a wastewater treatment system must be in accordance with AS/NZS 1546.1, AS/NZS 1546.2, AS/NZS 1546.3 or AS/NZS 1547 as appropriate.