The Evac vacuum interface valve device works in an analogous method to the Evac vacuum bathroom. The activator is activated each time a static head of 80 mm has accumulated within the graywater tank. This then transfers the operating vacuum to the plunger diaphragm, opening the discharge valve for 3 http://zanderyabff.collectblogs.com/40327309/the-basic-principles-of-vacuum-arvada