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: 30 (ø30), SUP Port Thread: Rc, Accessory: BD (with Bracket, Dust Bag)
Passage Diameter: 30 (ø30), SUP Port Thread: N (NPT), Accessory: B (with Bracket)