Aluminum Shield 27” Dia. top, 30” Dia. bottom, 8” H. with tube
Manhole Shields are temporary Pneumatic seals that keep 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. All aluminum fabrication.