PLUMBERS LICENSING AND PLUMBING STANDARDS REGULATIONS 2000

Western Australian Current Regulations

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PLUMBERS LICENSING AND PLUMBING STANDARDS REGULATIONS 2000 - REG 49

49 . Modifications to Plumbing Code

(1) For the purposes of regulation 48, the modifications set out in the Table are made to the Plumbing Code.

Table

Provision

Modification

Clause B2D5

After “fixture” insert:

for a new heated water installation, or for an existing heated water installation if the requirements in this clause applied to the installation when it was a new installation,

Before the Application statement insert:

The delivery temperature of heated water at the outlet of each sanitary fixture (other than a basin in a Class 1, 2, 4, 5, 6, 7, 8 or 10 building) for an existing heated water installation must meet the requirements for a new heated water installation if —

(a) in relation to a heated water installation with multiple water heaters — all water heaters in the installation are replaced or relocated; or

(b) in any other case — a water heater in the installation is replaced or relocated or an additional water heater is added to the installation.

Delete the Application statement and insert:

B2D5 applies to heated water installations intended for personal hygiene as stated in the clause.

Clause B2D6

Delete the Application statement and insert:

B2D6 applies to heated water installations to which B2D5 applies.

Provision	Modification
Clause B2D5	After “fixture” insert: for a new heated water installation, or for an existing heated water installation if the requirements in this clause applied to the installation when it was a new installation,
	Before the Application statement insert: The delivery temperature of heated water at the outlet of each sanitary fixture (other than a basin in a Class 1, 2, 4, 5, 6, 7, 8 or 10 building) for an existing heated water installation must meet the requirements for a new heated water installation if — (a) in relation to a heated water installation with multiple water heaters — all water heaters in the installation are replaced or relocated; or (b) in any other case — a water heater in the installation is replaced or relocated or an additional water heater is added to the installation.
	Delete the Application statement and insert: B2D5 applies to heated water installations intended for personal hygiene as stated in the clause.
Clause B2D6	Delete the Application statement and insert: B2D6 applies to heated water installations to which B2D5 applies.

(2) For the purposes of regulation 48, the modifications set out in the Table are made to AS/NZS 3500.2 (Sanitary plumbing and drainage) as referenced in the Plumbing Code.

Table

Provision

Modification

Clause 2.3

Delete paragraph (a) and insert:

(a) Bends in pipes shall —

(i) have a throat radius complying with AS/NZS 1260:2017 (PVC‑U pipes and fittings for drain, waste and vent applications) Table 5.6 and Figure B6; and

(ii) be free from wrinkling and flattening.

Clause 3.8.2

Delete paragraph (b) and insert:

(b) the drains laid through footings shall be installed with an annular space of not less than 25 mm filled with a liner of flexible material. However, the drains need not be installed in such a way if the drains are installed in a building that is —

(i) classified as a Class 1a or 10a building under Volume 1 and 2 of the National Construction Code; and

(ii) in sandy soil classified as Class ‘A’ within the meaning of AS 2870‑2011 (Residential slabs and footings).

Clause 3.18

Delete paragraph (d) and insert:

(d) A vacuum sewer system DN 100 downstream vent shall be connected on the main drain —

(i) before or on the inspection shaft riser; and

(ii) after the last fixture on the main drain.

The vacuum sewer system DN 100 downstream vent should be connected as close as possible to the inspection shaft riser.

(e) Vacuum sewer system and boundary trap low level vents shall terminate between a minimum of 150 mm and a maximum of 250 mm above ground or adopted flood level using one of the following methods —

(i) one 88° bend and a flat grate with invert level not less than 150 mm above ground or adopted flood level;

(ii) two 88° bends and a flat grate or vent cowl so that there is not less than 150 mm between the flat grate or vent cowl and the ground or adopted flood level;

(iii) an air admittance valve not less than 150 mm above ground or adopted flood level installed in accordance with Clause 6.9.

Clause 4.5.3

Delete paragraph (b).

At the end of the clause insert:

However, if the reflux valve is being installed in relation to an existing building, the reflux valve may be installed upstream from the inspection shaft.

Clause 4.6.2

Delete paragraph (b) and insert:

(b) have each gully riser provided with a grating or cover of a loose, pop‑out type to relieve surcharge and allow adequate ventilation to the gully riser; and

In paragraph (c)(ii) delete “surround).” and insert:

surround); and

At the end of the clause insert:

(d) in relation to a class 1a or class 10a building within the meaning of Volume 1 and 2 of the National Construction Code — have the height of the gully riser not more than 600 mm measured from the top of the water seal to the grate of the gully.

Table 4.6.6.6

Delete the table and insert:

TABLE 4.6.6.6

POINT OF MEASUREMENT ON FIXTURES FOR HEIGHT ABOVE OVERFLOW GULLY

Fixture

Point of measurement

Floor waste gully

Top surface level of the grate

All other fixtures (including greywater diversion devices)

Overflow level of the fixture

Clause 4.7.1

Delete paragraph (c) and insert:

(c) on the downstream end of any branch drain that exits a building, between the building and the junction into the main drain;

Clause 6.5.1

Delete the clause and insert:

6.5.1 General

Each sanitary fixture and appliance must have a self‑sealing device or trap.

A self‑sealing device must —

(a) be in the same room as the fixture or appliance that it serves; and

(b) be accessible.

A trap (other than a self‑sealing device) must —

(a) be in the same room as the fixture or appliance that it serves; and

(b) be accessible unless the trap is in the ground or concrete.

A trap (other than a self‑sealing device) in the ground or concrete must not have —

(a) a loose coupling nut; or

(b) a diameter that is greater than the diameter of the outlet for the fixture or appliance that the trap serves.

A trap (other than a self‑sealing device) that is in the ground or concrete must be directly below the outlet for the fixture or appliance that the trap serves.

Clause 13.9

Delete the passage that begins with “Where” and continues to the end of the clause.

Provision	Modification
Clause 2.3	Delete paragraph (a) and insert: (a) Bends in pipes shall — (i) have a throat radius complying with AS/NZS 1260:2017 (PVC‑U pipes and fittings for drain, waste and vent applications) Table 5.6 and Figure B6; and (ii) be free from wrinkling and flattening.
Clause 3.8.2	Delete paragraph (b) and insert: (b) the drains laid through footings shall be installed with an annular space of not less than 25 mm filled with a liner of flexible material. However, the drains need not be installed in such a way if the drains are installed in a building that is — (i) classified as a Class 1a or 10a building under Volume 1 and 2 of the National Construction Code; and (ii) in sandy soil classified as Class ‘A’ within the meaning of AS 2870‑2011 (Residential slabs and footings).
Clause 3.18	Delete paragraph (d) and insert:
	(d) A vacuum sewer system DN 100 downstream vent shall be connected on the main drain — (i) before or on the inspection shaft riser; and (ii) after the last fixture on the main drain. The vacuum sewer system DN 100 downstream vent should be connected as close as possible to the inspection shaft riser.
	(e) Vacuum sewer system and boundary trap low level vents shall terminate between a minimum of 150 mm and a maximum of 250 mm above ground or adopted flood level using one of the following methods —
	(i) one 88° bend and a flat grate with invert level not less than 150 mm above ground or adopted flood level;
	(ii) two 88° bends and a flat grate or vent cowl so that there is not less than 150 mm between the flat grate or vent cowl and the ground or adopted flood level;
	(iii) an air admittance valve not less than 150 mm above ground or adopted flood level installed in accordance with Clause 6.9.
Clause 4.5.3	Delete paragraph (b). At the end of the clause insert: However, if the reflux valve is being installed in relation to an existing building, the reflux valve may be installed upstream from the inspection shaft.
Clause 4.6.2	Delete paragraph (b) and insert: (b) have each gully riser provided with a grating or cover of a loose, pop‑out type to relieve surcharge and allow adequate ventilation to the gully riser; and
	In paragraph (c)(ii) delete “surround).” and insert: surround); and
	At the end of the clause insert: (d) in relation to a class 1a or class 10a building within the meaning of Volume 1 and 2 of the National Construction Code — have the height of the gully riser not more than 600 mm measured from the top of the water seal to the grate of the gully.
Table 4.6.6.6	Delete the table and insert: TABLE 4.6.6.6 POINT OF MEASUREMENT ON FIXTURES FOR HEIGHT ABOVE OVERFLOW GULLY Fixture Point of measurement Floor waste gully Top surface level of the grate All other fixtures (including greywater diversion devices) Overflow level of the fixture
Clause 4.7.1	Delete paragraph (c) and insert: (c) on the downstream end of any branch drain that exits a building, between the building and the junction into the main drain;
Clause 6.5.1	Delete the clause and insert: 6.5.1 General Each sanitary fixture and appliance must have a self‑sealing device or trap. A self‑sealing device must — (a) be in the same room as the fixture or appliance that it serves; and (b) be accessible. A trap (other than a self‑sealing device) must — (a) be in the same room as the fixture or appliance that it serves; and (b) be accessible unless the trap is in the ground or concrete. A trap (other than a self‑sealing device) in the ground or concrete must not have — (a) a loose coupling nut; or (b) a diameter that is greater than the diameter of the outlet for the fixture or appliance that the trap serves. A trap (other than a self‑sealing device) that is in the ground or concrete must be directly below the outlet for the fixture or appliance that the trap serves.
Clause 13.9	Delete the passage that begins with “Where” and continues to the end of the clause.

(3) For the purposes of regulation 48, the modifications set out in the Table are made to AS/NZS 3500.4 (Heated water services) as referenced in the Plumbing Code.

Table

Provision

Modification

Clause 5.8

In NOTE 1 delete “Where the water supply is scaling in nature, an expansion control valve or expansion vessel should” and insert:

An expansion control valve or expansion vessel must

Table 5.9.1(A)

In the row relating to Expansion control valve or expansion vessel (Australia only) in the 3 ^rdand 4 ^th columns delete “g” and insert:

Yes

Provision	Modification
Clause 5.8	In NOTE 1 delete “Where the water supply is scaling in nature, an expansion control valve or expansion vessel should” and insert: An expansion control valve or expansion vessel must
Table 5.9.1(A)	In the row relating to Expansion control valve or expansion vessel (Australia only) in the 3 ^rdand 4 ^th columns delete “g” and insert: Yes

[(4), (5) deleted]

[Regulation 49 inserted: Gazette 24 Apr 2015 p. 1500‑12; amended: Gazette 29 Apr 2016 p. 1346; 13 Dec 2016 p. 5624‑5; 9 Apr 2019 p. 1057‑60; SL 2022/163 r. 7 and 11; SL 2024/12 r. 55.]

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