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Allegro® Manhole Ventilation Passthru

Manhole ventilation helps maintain workplace safety in confined spaces.
  • Manhole system features low 24"x24" profile to circulate and maintain air flow with minimum restriction into sewers, manholes, and tanks.
  • First manhole system in which a low profile manhole air vent, a 90° elbow and built-in mounting are combined in an all-in-one unit.
  • Collapsible duct can be dropped into manhole by means of storage bag with quick-release draw string.
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Allegro® Manhole Ventilation Passthru


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Allegro® Manhole Ventilation Passthru

  • Low density, high impact polyethylene material effectively resists extreme temperatures and heavy use.
Includes 12" Manhole Ventilation Passthru (MVP) with 6' Ducting, 8" Manhole Ventilation Passthru (MVP) with 6' Ducting.



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