AWWA C506 : 78(R1983)
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
BACKFLOW PREVENTION DEVICES - REDUCED PRESSURE PRINCIPLE AND DOUBLE CHECK VALVE TYPES
09-01-1990
01-12-2013
Describes two types of backflow prevention devices made to withstand a water working pressure of 150 psi without damage to working parts, operates on hot or cold water lines. Types are reduced pressure principle and double check valve types
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