AS 2845.2-2010

1 - AS 2845.2-2010 WATER SUPPLY-BACKFLOW PREVENTIONS DEVICES - REGISTERED AIR GAPS AND REGISTERED BREAK TANKS
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - 1 SCOPE
7 - 2 NORMATIVE REFERENCES
7 - 3 DEFINITIONS
7 - 3.1 Air gap-Water supply system
7 - 3.2 Accessible
7 - 3.3 Break tank
7 - 3.4 Register
7 - 3.5 Spill level
8 - 3.6 Storage tank
8 - 4 DESIGN
8 - 4.1 General
8 - 4.2 Break tanks
8 - 4.2.1 General
9 - 4.2.2 Type A break tank unobstructed air gap
9 - 4.2.3 Type B break tank air gap with overflow
11 - 4.2.4 Type C break tank air gap with diverter and overflow
12 - 4.2.5 Type E hygienic break tank
12 - 5 MARKING
12 - 5.1 Air gaps
12 - 5.2 Break tanks
13 - APPENDIX A - STORAGE TANKS-INFLOW AND OVERFLOW METHOD OF CALCULATION
13 - A1 GENERAL
13 - A2 INFLOW RATE
16 - A3 OVERFLOW SIZE AND SPILL LEVEL
17 - A4 AIR GAP
17 - A5 HEIGHT OF INLET ABOVE INVERT LEVEL OF OVERFLOW

Specifies requirements for registered air gaps including those incorporated in break tanks used as backflow prevention devices for the protection of water supplies.

This Standard specifies requirements for registered air gaps, including those incorporated in break tanks, used as backflow prevention devices for the protection of water supplies.

First published as AS 2845.2-1994.
Second edition 1996.
Third edition 2010.