TESTING APPLICATIONS: UNIDIRECTIONAL FLUSHING
Unidirectional flushing is the process of cleaning the water mains of a water distribution system by flowing water in one direction through the mains. This is accomplished by closing specified valves and by flushing strategically located hydrants. By closing specified valves, the velocity of water through the mains is increased. The main purpose of unidirectional flushing is to improve water quality within the distribution system. It is generally considered to be more effective at removing sediments than conventional flushing and also uses less water.
Where can I find more information?
- AWWA Maintaining Water Distribution-System Quality
- AWWA Research Foundation — Investigation of Pipe Cleaning Methods
WHAT EQUIPMENT DO I NEED?
Our recommended setup for hydrant flow testing includes everything you need for performing a hydrant flow test from the 2.5″ Hydrant port with the Little Hose Monster™. Components fit neatly into a die-cut, closed cell case with wheels and telescoping handle for easy transportation. A 10′ hose is carried outside the case.
Our recommended setup for hydrant flow testing through the hydrant pumper port (4.5″ NH) with the BigBoy Hose Monster. This setup is ideal for high-flowing hydrants. Hose is also available with 4″ NH or 5″ STORZ connections