Armstrong B7478 Mechanism 6AV/LD 17-4 H900 V S Drainer/Airvent for 6-AV Air Vent

Armstrong part B7478: mechanism 6av/ld 17-4 h900 v s drainer/airvent for the Armstrong 6-AV air vent (1/2/3/6-AV Series).

Armstrong 1/2/3/6-AV Series: air vent from Armstrong International. See the manufacturer documentation linked below for specifications.

Manufacturer documentation for the 1/2/3/6-AV Series: data sheet, installation and maintenance manual.