Plumbing regulations call for the water trap seal on sanitary fixtures to be maintained at all times. This is typically accomplished by introducing atmospheric air into the plumbing drainage system via a separate smaller vent pipe going through the roof. But there are limitations to venting with pipes in the conventional way.
Aliaxis has developed innovative single stack solutions that eliminate the need for a separated vent pipe, allowing customers to save space, costs and installation time and ensure better system performance.
These single stack solutions are especially helpful in solving design challenges for taller buildings, open or complex buildings, green buildings, or modular buildings, but they also provide benefits for middle-rise buildings. Challenges that can be addressed with a single stack solution include no possible roof penetration, limited vertical shaft space, complex shaft structure, a need for a secondary system for recycled water, or other circumstances.
Our single stack solutions are of two types:
- Single stack system (innovative passive venting). The single stack system with stack aerator limits pressure transients, protecting traps seals up to a certain water flow.
- The P.A.P.A. ( Positive Air Pressure Attenuator) (active venting). The P.A.P.A. (Positive Air Pressure Attenuator) system gets rid of the pressure transients as quickly as possible to avoid water trap seals breach, with no limitation of height or water flow rate. This system is used in new buildings as well as in existing buildings as a problem-solver.