Why use Knutson Manhole Inserts?
- Knutson manhole inserts are manufactured from corrosion-proof material suitable for atmospheres containing hydrogen sulfide Feature.
- The inserts eliminate water run-off from entering sewer collection systems at the manholes.
- Keeps dirt and debris out of sewer collection system and controls sewer odors.
- Excellent for electrical and telecommunication manholes.
- Manufactured of high density, high molecular weight polyethylene, which eliminates brittleness, caused by cold temperatures.
- Ten year guarantee against manufacturer defects (does not cover valve, handle or gasket).
- Ventilation by valve or vent hole and no corrosive parts.
- Certified engineering reports from Southwest Research Institute available upon request.