ValveTek Contract Operations for NO-DES Technology covers the entire country and serves all water utility systems, military bases, and industrial cleaning applications. NO-DES water main flushing cleans contaminants out of the interior of potable water main lines by use of filtration and discharges only a fraction of what conventional flushing practices discharge. NO-DES is environmentally friendly and conserves drinking water on a municipal level.
The NO-DES Unit pulls dirty water in from deep within the water main, up through the fire hydrant, through our inlet hose and into our filtration bay where it passes through 36 absolute 1 micron filter bags and gets returned through our outlet hose and into a second fire hydrant to be re-distributed within the flushing zone.
Filtration is considered to be the safest, most cost effective, and least invasive method available to the water industry when it comes to improving water quality. See here how NO-DES Operators pull dirty filter bags out of the NO-DES filter vessel to replace during the flushing process.
ValveTek uses Absolute 1 Micron rated filter bags during flushing operations using NO-DES Technology. These bags have six layers of filtration! The bag seen here was removed, along with 35 others, because of the massive amount of biofilm and debris that has been loaded into it after a few short minutes of NO-DES flushing on a potable water main.
Traffic is not effected from NO-DES Operations. The rig easily fits on the shoulder of a road and water lines can be laid out down curbs and sidewalks. If a NO-DES water line needs to cross a street and vehicles need to pass over the hose during operations, ValveTek operators can place small traffic ramps out so that cars may pass with no disruption.
As one water line pulls distribution water into the NO-DES rig the other hose lets it come out once its gone through the filtration process. The water going back into the distribution system has been filtered down to below 1 NTU of turbidity and has been analyzed by a duel inline turbidity reading system on the NO-DES control panel.
The NO-DES operators control panels center piece is its two electronic inline turbidity meters. These two meters analyze and read turbidity levels as water comes in the NO-DES unit and as it goes out of the NO-DES unit. ValveTek flushes all water mains until turbidity meters read less than 1.0 NTU and will not stop a flushing sequence until that goal is reached.
All NO-DES Flushing Units offer the availability to inject chlorine to boost residuals during the flushing process. Chlorine levels can be read with hand held devices and boosted with a timed drip and meter. ValveTek never carries any chemicals of our own and will only use chlorine that has been provided by the client.