The ZHV is versatile and can function either as a blow off unit or a vacuum unit depending on the direction of the output port. There is only one supply port and with available mounting brackets, it is very easy to install.
Passage Diameter: ø30, SUP Port Thread: -, Accessory: -
Passage Diameter: 20 (ø21.6), SUP Port Thread: N (NPT), Accessory: BD (with Bracket, Dust Bag)