Standard
Track updates
AS/NZS 2845.2:2025
[Current]Water supply - Backflow preventions devices, Part 2: Registered air gaps and registered break tanks
AS/NZS 2845.2:2025 specifies design and marking requirements for registered break tanks and air gaps used as backflow prevention devices for the protection of water distribution systems.
Published: 27/06/2025
Pages: 14
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Design
4.1 General
4.2 Break tanks
4.2.1 General
4.2.2 Type A break tank — Unobstructed air gap
4.2.3 Type B break tank — Air gap with overflow
4.2.4 Type C break tank — Air gap with diverter and overflow
4.2.5 Type E — Hygienic break tank
5 Marking
5.1 Air gaps
5.2 Break tanks
Appendix A
A.1 General
A.2 Inflow rate
A.3 Overflow size and spill level
A.4 Air gap
A.5 Height of inlet above invert level of overflow
Appendix B
Bibliography
Cited references in this standard
One-time Purchase
Access via web browser on any device
One-time purchase
Single publication
Offline access via PDF^
$109.95 AUD
Inclusive of GSTFormat *
Web Reader
Licenses *
1 License (for yourself - not shareable)
Total$109.95 AUD
IMPORTANT