MVP 12 Allegro Industries 9510-60 Manhole Ventilation Pass Thru

Allegro Industries 9510-60 Manhole Ventilation Pass Thru, MVP, 12': Industrial & Scientific. Allegro Industries 9510-60 Manhole Ventilation Pass Thru, MVP, 12": Industrial & Scientific. The Manhole Ventilation Pass thru (MVP) is designed to maintain and redirect air flow with minimal restriction into manholes, sewers and tanks. The MVP is the first manhole system that combines the low profile manhole air vent, 90° elbow and built in mounting all into one easy assembly. 。 。 。

MVP 12 Allegro Industries 9510-60 Manhole Ventilation Pass Thru