8″ Manhole Ventilation Passthru (MVP), ALLEGRO Industries

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8″ Manhole Ventilation Passthru

KWD 221.200 221.20000000000002 KWD KWD 221.200

KWD 221.200

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(KWD 221.200 / Each)
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8″ Manhole Ventilation Passthru (MVP)

The Manhole Ventilation Passthru (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. Patented by Allegro (US Patent No. D673,668).



  • Linear Low-Density Polyethylene (LLDPE)

  • Recyclable

  • Bright yellow color


  • Vinyl and polyester with PVC coating

  • Compressible inner support coils

  • Heat resistant up to 180° F (88.2° C)

  • Meets ASTM 227 specs

  • UL 94V-0 Flame Retardant


  • Low profile elbow fits underneath the lower cross bar of the guardrail

  • Manhole cover fits into flat channeled corners for stabilization

  • Small storage bag holds ducting

  • Quick release draw string to drop ducting into manhole

  • Collapsible duct for easy entry springs back into shape once worker is down into the manhole

  • Combines three components, the low-profile manhole air vent, 90° elbow and built-in mounting all into one easy assembly

  • Reducing overall size, storage and shipping cost