Page 296 - Water Engineering Hydraulics, Distribution and Treatment
P. 296
274
Cross-Connection Control
Chapter 9
of hose bibb vacuum breaker
backflow preventer
Gate valve Recommended installation
closed
Figure 9.7 Chlordane and heptachlor in a
city in Pennsylvania.
Water cooler
High school
Bubbler
Bubbler
Recommended installation
of backflow preventer
Street Leaky check valves
Toxic rust inhibitor and
defoamant containing
sodium dichromate
Pump
High school boilers Figure 9.8 Boiler water enters high school drinking water.
