Historical
ANSI/ASSE 1013-2009
Performance Requirements for Reduced Pressure Principle Backflow Preventers and Reduced Pressure Principle Fire Protection Backflow Preventers
The purpose of a Reduced Pressure Principle Backflow Preventer and a Reduced Pressure Principle Fire Protection Backflow Preventer is to keep contaminated water from flowing back into a potable water distribution system when some abnormality in the system causes the pressure to be temporarily higher in the contaminated part of the system than in the potable water supply piping.
Content Provider
American Society of Sanitary Engineering [asse-sanitary]
