A hydrant testing and flushing program is very important to the maintenance of a domestic water distribution system. Each year, the we may systematically open hydrants throughout the Borough to gauge flows and to allow water to flow at a high velocity through the distribution main lines.
The two main types of flushing programs are conventional flushing and uni-directional flushing.
Conventional flushing involves flushing one hydrant at a time, often during hydrant inspections and flow testing.
Unidirectional flushing involves the sequential closing of water valve in order to maximize water flow velocity to create a pipe scouring effect.
Regular flushing serves the following purposes:
Enhances long term water quality by removing sediments from inside the mainline and flushing them out through the hydrant.
Identifies malfunctions of the hydrant and related valve issues.
Helps determine weaknesses in the water distribution system.
Identifies inadequate water volumes and pressures in the mainlines.
Helps determine fire flows at the hydrant.