Alternatives to Gate Valves in Stormwater and Wastewater Drainage

Stormwater and wastewater (sewage) systems can be built as separate or combined facilities. The more modern houses and businesses now have separate piping systems for sewage and stormwater, while some cities are upgrading their present combined systems due to the occurrences of spillage of sewage into the environment following a rainstorm. This gate valve spillage can be from overflow at the wastewater plant or from regulators in the piping system, but both measures involve dumping raw sewage into the local environment.
This happens because of a combined plant’s inability to process the additional stormwater and sewage at the same time, preventing a back-flow of sewage to the local houses.
This is an article on flow control of drainage from wastewater and stormwater systems, in particular from combined sewage systems. We begin with a look at the some of the problems with a combined sewage plant and then move on to the control of outflow.
From the original1Gate valve
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