A drain-waste-vent is a part of a sewage system that removes greywater or sewage from a building. It also is responsible for regulating the air pressure in the waste-system pipes which helps flow to occur. Waste is produced in showers, sinks and toilets and exists within the fixtures through a dipped section of pipe. All of these fixtures contain traps which prevents sewer gases from leaking into a building. These fixtures are also connected to waste lines which take the waste to a soil stack. At the drain system’s lowest point, the drain-waste vent is attached. Waste is removed through a drain and taken to a sewage line whether to a public sewer or a septic tank.
Vents helps to release sewer gases outside and also promote oxygen to a waste system which allows for good flow. These vents also equalize the pressure and allow the system to be effectiveness and fully functioning at all times. Every fixture of the drain system must have an internal or external trap to protect the home from backups or from dangerous toxic gas from permeating the home itself.