Studor pioneered the use of the air admittance valve as an effective method of drainage ventilation. Their range now includes a comprehensive selection of AAVs as well as the SSPS (Studor Single Pipe System) which incorporates the Studor P.A.P.A. (Positive Air Pressure Attenuator), particularly effective in medium and high rise building drainage ventilation. Studor will support you with solutions and services for any building to ensure you eliminate drainage smells with a maintenance-free drainage system.