Figure 4-36.Distribution system layout.
water remains for long periods of time, causing
maintenance of one utility causes a minimum of
undesirable tastes and odors in nearby service lines.
interference with other utilities.
Mains should be located along streets to provide
short hydrant branches and service connections. Mains
should not be located under paved or heavily traveled
areas. They should be separated from other utilities to
ensure the safety of potable water supplies, so the
The purpose of installing shutoff valves in water
mains at various locations within the distribution
system is to allow sections of the system to be taken
out of service for repairs or maintenance without
significantly curtailing service over large areas.
Valves should be installed at intervals not greater than