Drinking Water Conveyance and Distribution - The Drinking Water - page 75

(A)

Branch Line

Flow

Main Supply Line

(B)

Flow

Loop

Feeder

(C)

Flow

Control Feeder

(D)

Figure 5.8
Distribution line networks: (A) branched, (B) grid, (C) combination branched/grid, and (D)
dead-end.

1. Clear wells are used to store filtered water from a treatment works
and serve as chlorine contact tanks ( Figure 5.11 ).

2. Elevated tanks are located above the service zone and are used pri-
marily to maintain an adequate and fairly uniform pressure to the
service zone ( Figure 5.12 ).

3. Stand pipes are tanks that stand on the ground; they have a height
greater than their diameter ( Figure 5.13 ).

4. Ground-level reservoirs are located above service areas to maintain the
required pressures ( Figure 5.14 ).