Description
Allegro 9510-55 8″ Manhole Ventilation Passthru (MVP) with 15′ Ducting streamlines confined space ventilation by combining a low-profile manhole air vent, 90° elbow, and built-in mounting base into one efficient system. The included 15-foot collapsible ducting allows for easy deployment and storage, springing into shape when released inside the manhole. Made from durable vinyl and polyester with a flame-retardant PVC coating, the ducting is heat resistant up to 180°F and meets ASTM 227 and UL 94V-0 standards. The unit’s flat channel corner stabilizes the manhole cover, and its Linear Low-Density Polyethylene (LLDPE) body is both lightweight and recyclable. Ideal for industrial ventilation needs in tight spaces.
Features:
- Integrated 90° elbow, mounting base, and low-profile air vent.
- Includes 15′ collapsible duct stored in compact drawstring bag.
- Ducting made from vinyl/polyester with PVC coating.
- Heat resistant to 180°F and flame retardant (UL 94V-0).
- Constructed from lightweight, recyclable LLDPE.
Benefits:
- Improves safety and airflow in confined manhole spaces.
- Reduces setup time with integrated, ready-to-use design.
- Compact and easy to transport or store.
- Durable materials withstand harsh jobsite conditions.
- Compliant with key safety and material standards.
Technical Specifications:
- Model: 9510-55
- Application: Manhole ventilation in confined spaces.
- Ducting Length: 15 feet (collapsible).
- Material: LLDPE body, vinyl/polyester duct with PVC coating.
- Heat Resistance: Up to 180°F.






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