Figure 4-36. - Distribution system layout.

water remains for long periods of time, causing undesirable tastes and odors in nearby service lines.

MAIN LOCATION

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 maintenance of one utility causes a minimum of interference with other utilities.

VALVE LOCATION

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