Description
The Allegro 9510-55 Manhole Ventilation Pass Thru (MVP) is a compact, integrated ventilation solution designed to maintain and redirect airflow into confined spaces like manholes, sewers, and tanks with minimal restriction. It combines a low-profile manhole air vent, a 90° elbow, and built-in mounting into one unit that’s simple to install and deploy.
The system also features a quick-release drawstring for deploying ducting from above and a manhole cover that fits into a flat channel corner for stabilization. Its lightweight, recyclable design ships in a small carton and helps reduce storage and transport costs while improving ventilation efficiency on the job.
Typical Uses
-
Manhole and sewer ventilation
-
Confined space access and airflow management
-
Construction, utility, and maintenance applications




