Manhole Frames & Covers : HydroVent

Neenah Foundry’s Hydro-VentTM manhole cover is designed using LiftMateTM ball and socket hinge system technology coupled with a heavy duty latching mechanism. The Hydro-VentTM manhole cover is designed to provide surge relief at the location of the installation during events when the sewer system becomes surcharged.

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Catalog Number A B C E F Shape
R-1550-HV 23 1.5 21 36 9 Round
R-1650-HV 26 1.5 24 34 4 Round
R-1642-HV 26 1.5 24 36 7 Round
R-1743-HV 32 1.5 30 39 1/4 6 Round
R-1739-HV 38 1.5 36 47 1/2 6 Round
All dimensions are listed in inches unless otherwise noted.
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