close menu
This website uses cookies to store your accessibility preferences. No personal / identifying information is stored. More info.

How It Works!


E-One Low Pressure Sewer overview
This video gives a general overview of how low pressure sewer systems work, and shows the key features of the Environment-One grinder pumps that are used in our system. There are over 1300 grinder pumps in the MLWSA system (video courtesy of Environment-One Corporation)

Airvac Vacuum Sewer overview 
This video gives a general overview of how vacuum sewer systems work, and shows the key features of the Air-Vac components that are used in our system.  There are over 150 vacuum valve pits in the MLWSA system. (video courtesy of Aqseptence Group - Airvac)

 Ovivo WWTP Oxidation Ditch
This video gives a representative overview of the Carrousel Biological Wastewater Treatment Process at the MLWSA WWTP. (video courtesy of Ovivo)


Sewage air release valve 
This video gives an operational overview of an A.R.I. sewage air release valve. There are 70 valves of this type in the MLWSA system. MLWSA Field Staff tests all valves periodically, and make repairs to failed valves as necessary. ( video courtesy of A.R.I. Flow Control Accessories Ltd.)