: We are helping our friend find definitions needed for : school and are having problems.: Please help…..: 1 Recirculation main : 2 Recirculation valve : 3 Recirculation pump : 4 Direct siphonage : 5 Vent stack : 6 Stack vent: any assistance would be greatly appreciated.Colin, Good morning, I hope you and the members of your class are well and I will endeavour to give you definitions that will help in the school assignments that you may be involved in.Main: Gravity Main: A main through which water, sewage or stormwater flows under the influence of gravity.Reticulation Main: A network of pipes to which service pipes of individual properties are connected.Rising Main: A main through which water or sewage is pumped at pressure.Stormwater Main: The conduit including stormwater pits, vested in the Regulatory Authority, for the conveying of stormwater.Trunk Water Main: A water authoritys water main for conveying water from one area to another arera.Water Main: A conduit or pipeline vested in the water authority and constructed to convey potable water supplied by that authority.Potable Water: Water that is suitable for human consumption.Stack Vent: Is the extension of a discharge stack above the highest connected discharge pipe.Vent: A pipe provided to limit the pressure fluctuations within a discharge pipe system or to encourage the passage of gases.Pump: A mechanical devise generally driven by a prime mover, and used for raising fluids from a lower to a higher or for circulating fluid in a pipework system.Colin I hope that this list will be of help to you and your students. All the best to you Colin Dunn.The definitions were contained in Australian Standard 3500
