Ventilation systems
The maintenance of the pressure levels inside the waste system network and the elimination of the effects of siphonage are guaranteed by suitable vent systems of the pipes. Vent systems are made up of pipes connected to the waste system that ensure a flow of air to limit the variations in pressure and guarantee a silent operation of the sanitary fixtures. During flushing the flow pushes the air in front and creates a back pressure, this back pressure calls on new air through the vent stack.
The European Standard UNI EN 12056 defines different configurations of the vent systems both for the waste stacks and the waste branches. In practice, it is possible to come across numerous alternative solutions to the basic configurations defined by the standard that offer numerous variations that are suitable for resolving specific system requirements (for more details please consult Valsir’s technical handbook “Waste system inside the building”).
