Terrain P.A.P.A. & Pleura Vent System
The Terrain P.A.P.A.® (Positive Air Pressure Attenuator) is a positive pressure reduction device that works with the Pleura Vent System which is an air pressure regulator acting as an air admittance valve - both designed to mitigate the effects of positive and negative air fluctuations in single stack drainage systems. This allows fresh air into the branch pipework or to the top of a waste or soil stack and ultimately eliminates the need for a traditional piped secondary vent system, meaning that there's no need for vent penetrations in the slab and drastically reducing the requirement for vent penetrations through the roof.