Can the NO-DES method achieve typically desired flow rates of 3-5 feet per second in water mains that are 2″-12″ in diameter?
(A) Yes, the NO-DES system and unit can meet these AWWA recommended flushing velocities in 2″-12″ water mains. With NO-DES, water hammer potentials are greatly reduced, as the water velocity is being provided by the NO-DES unit’s pump, not the rest of your distribution system. Only the water within the temporary piping loop is being circulated, filtered and disinfected. This greatly minimizes the impact on your distribution system and customers. If the flushing of water mains larger than 12″ is desired, two NO-DES units can be hooked up in parallel.