Allegro 9510-50 8" Manhole Ventilation Passthru, Effortless Access, Maximum Safety in Confined Space Ventilation
Boost safety and efficiency during confined space operations with the Allegro 9510-50 8" Manhole Ventilation Passthru (MVP). Designed specifically for confined space entry, this rugged, high-visibility yellow MVP combines airflow efficiency with user protection, making it the go-to solution for utility, municipal, and industrial professionals. Crafted from lightweight, durable polyethylene, this MVP fits securely into standard 30" manholes and includes an integrated 90° elbow to direct airflow downward, reducing ducting kinks and increasing airflow. Its quick-connect ducting flange allows for fast, secure attachment to 8" ducting, and the collapsible design ensures easy transport and storage.
Ensure a safer and more efficient work environment with the Allegro 9510-50 MVP-an essential tool for any confined space ventilation system.
Type: Manhole Ventilation Passthru | Material: Vinyl Polyester | Outlet Diameter (in.): 8 | Color: Yellow
Features:
- MVP made from Linear Low-Density Polyethylene (LLDPE)
- Bright yellow color for easy visibility
- Available with and without 15' (4.5 m) ducting
- Ducting is made from vinyl and polyester with PVC coating
- Ducting is heat resistant up to 180° F (88.2° C)
- Small storage bag holds ducting
- Quick release draw string to drop ducting into manhole
- Patented by Allegro
- Made in USA
- The first manhole system that combines the low profile manhole air vent, 90° elbow, and built-in mounting all in one unit.
- Collapsible duct, for easy entry, stored in a small storage bag that can be dropped into the manhole with a quick release of the drawstring.
- The manhole cover fits into a flat channel corner for stabilization.
- Compact, lightweight, and made from Linear Low-Density Polyethylene (LLDPE), this unit is easy to store and ships in one small carton.
- Ducting springs back into shape once worker is down into the manhole
- Reduces overall size, storage, and shipping cost
Application:
- Construction
- Industrial
- Sewer
- Confined Space

For help choosing the correct Walter Surface Technologies Manhole Ventilation Passthrus for your application, please call (800) 608-5210 or email info@intlairtool.com
- Type
- Manhole Ventilation Passthru
- Material
- Vinyl Polyester
- Outlet Diameter (in.)
- 8
- Color
- Yellow
