All Aluminum Fabrication
Manhole Shield Keeps ground water from flowing into the open manholes. Fits 27" & 30" manholes.
Weighs 20 LBS
Pneumatic Seal keeps Ground Water from Flowing into the Open Manholes
Just Inflate Tube with 5-10 lbs. of Air or Nitrogen to form a Water-Tight Seal
No Clamps or Sealing Compounds required
Series 2730 (reversible 27" & 30") fits most Communications Manhole Openings
Model 3336 (33" & 36") fits many Electric Utility Manholes
Custom Sizes are available.