Hutterer & Lechner Air admittance valve with tee DN40x1 1/2', DN40 [Code number: HL 904T]

Air admittance valve HL 904T is designed for installation in unventilated sewer risers. The valve protects sanitary devices against disruption of water trap. Capacity is 5,5 l/s. You can mount this air admittance valve on a long horizontal pipe, but pipe length must be greater 4 meters. It is equipped with  T-connection DN40 x 1 1/2'.