This Practice Note provides guidance on backflow requirements when installing toilet seat douches.

The content below provides guidance on:

• Douche seats certified to WMTS-051:2016
• Douche seats certified to WMTS-051:2021
• Determining backflow requirements

Superseded documents

These are Superseded Practice notes relating to BP 02 Toilet seat douches:

• Superseded 7 December 2023 (PDF, 833.43 KB)
• Superseded 3 May 2023 (PDF, 754.2 KB)

This Practice Note provides guidance to clarify some of the plumbing issues associated with cross connections in drinking water supplies.

The content below provides guidance on:

• Backflow and cross connections
• Hazards rating
• Providing protection
• Determining hazard rating
• Owners’ responsibility
• Containment protection
• Installation/commissioning

Superseded Document

These are Superseded Practice notes relating to BF 03 | Cross connections in drinking water supplies

• Superseded 13 February 2024 (PDF, 1019.72 KB)

This Practice Note provides guidance on installation requirements when connecting drinking water supply at dental surgery; and:

• Installation requirements

Superseded Document

These are Superseded Practice notes relating to CW 02 | Water supply for dental consoles

• Superseded 4 May 2023 (PDF, 784.86 KB)

This Practice Note provides guidance on the requirements for maximum static water pressure at any water outlet within a building and water efficient tapware; and:

• Maximum static pressure and testing
• Types of pressure regulating devices
• Flow rate requirements
• Complying with flow rate requirements

Superseded Document

These are Superseded Practice notes relating to CW 03 | Maximum static water pressure within a building

• Superseded 4 May 2023 (PDF, 934.56 KB)

This Practice Note (formerly Technical Solution Sheet) is currently under review.

This Practice Note (formerly Technical Solution Sheet) is currently under review.

This Practice Note provides guidance on the regulatory requirements for installation of bedding materials for below ground sanitary drains; and:

• Regulatory requirements
• General requirements
• Sand bedding materials and drainage inspections
• Suitability of bedding materials and table

Superseded Document

These are Superseded Practice notes relating to DR 02 | Bedding materials for below ground sanitary drains

• Superseded 3 May 2023 (PDF, 897.03 KB)

This Practice Note provides guidance on the requirements for below ground property sewer drains, and:

• Obtaining consent to start below ground sanitary drainage work
• Information required to book a drainage inspection
• Lodging compliance certificates
• Building over property sewerage drains
• Building over a boundary trap riser or inspection shaft at the property connection point
• Redeveloping and renewing drains

This Practice Note provides guidance on drainage installation in reactive soil, unstable and water charged ground to meet the requirements of AS/NZS 3500.2 – Clause 5.6. ; and:

• Drainage installations and service life
• NCC 2022 Volume 3 Plumbing Code of Australia (PCA) Requirements
• Determining soil conditions
• Sites requiring special drainage designs
• Steps to follow when laying the drain
• Drainage Inspections

This Practice Note provides guidance on the use of junction fittings installed in gravity discharge sanitary and drainage systems. and:

• Junction fittings permitted on grade
• Junction fittings not permitted on grade
• Junctions installed in vertical plane
• Square junctions in drains on vertical risers & as inspection openings
• Junctions permitted for Jump ups on Sanitary Drainage Systems

This Practice Note provides guidance on the regulatory requirements for installing boundary traps, and

• Plumbing Regulations & PCA requirements
• Suitable boundary traps
• Boundary trap areas
• Installation requirements

This Practice Note provides guidance to the industry on the correct deemed to satisfy requirements for below ground site stormwater drains including gradient, depth of cover, bedding, embedment and backfill material.

The content below provides guidance on:

• General Requirements
• Embedment and trench fill terminology
• Bedding and embedment material
• Drains laid in stable ground
• Drains laid in other than stable ground
• Trench fill (backfill) material
• Minimum grade
• Minimum pipe cover

Superseded or Replaced Document

This practice note replaces former Technical Solution Sheet 4.06 Drainage - (Below Ground Stormwater) Bedding Site Stormwater drains.

This Practice Note (formerly Technical Solution Sheet) is currently under review.

This Practice Note (formerly Technical Solution Sheet) is currently under review.

This Practice Note specifies the requirements for an allowable leakage rate for existing standard natural gas installations where the metering pressure is nominally 1.13 kPa and the operating pressure is taken to be 1.7 kPa, and provides guidance on:

• What are the different pressures used in gas installations?
• Allowable leakage in standard gas installations
• What measures should be taken to find a gas leak?
• When should existing gas installations be tested?
• What is the leakage rate for ‘Other Gases and Pressures’?
• Is there an allowable pressure drop for an existing gas installation?
• Can I use a manometer to determine the leakage rate?

This Practice Note specifies the requirements for non-combustible surface requirements and clearances for Type A residential cooking appliances, and provides guidance on:

• Protection of combustible surfaces near a domestic gas cooking appliance
• Installation requirements where clearances are less than 200mm for stainless steel, toughened safety glass, ceramic tiles, reconstituted stone, and other material.

This Practice Note specifies the requirements for the installation requirements for gas heating appliances installed in a roof space, and provides guidance on:

• Location considerations
• Access for maintenance and servicing
• Platform protection