Your home’s plumbing system is designed to efficiently remove water and waste. Its drainage and vent functions are actually two systems that work together.
Drainage pipes carry waste out of your home to the city sewer. Vent pipes supply fresh air to each plumbing fixture in the house, which helps the system move water through the drainage pipes each time a toilet is flushed or a sink is drained.
Plumbing air vents also prevent sewer gases from entering the home and allow wastewater gas and odour to escape. Plumbing vent pipes are located on roofs, away from windows or air conditioning units, so that the fumes can easily dissipate.
In plumbing, a vent, or more precisely, a drain waste vent, helps to remove sewage and grey water from your home. The vent also helps to regulate air pressure in the plumbing pipes to ensure that the water flows unimpeded through them.