Canpipe Limited

Environmental Monitoring Supplies

Flush Mounted Manhole Covers

Aluminum Cast

Our manhole covers are manufactured in Canada by Canpipe which meet AASHTO Standard M306-89 which are load rated to 40,000 lbs.

Features Include:

  • Diameters include 4”, 6” and 8”
  • Skirt lengths available are 6”, 10”, 12” and 18”
  • Buna-N (Nitrile) O-Rings
  • Stainless Steel bolts
  • Observation Monitor “Do Not Fill” triangle on cover
  • Cast Aluminum lid and rim
  • One-piece aluminum skirt welded to rim
  • Custom skirt lengths also available
  • Larger diameter available upon request
  • O-ring and bolt kits available as replacement parts

Cast Iron

Cast iron manholes are also available for higher traffic areas and harsher environments utilizing galvanized skirts and steel skirts.

  • Diameters include 6”, 8” and 12” with 12” skirt lengths
  • Additional diameters available upon request

Custom manhole covers are available in heavy steel in 18” with a 12” skirt and 24” and 36” diameter with a 24” skirt.

Square and rectangle designs available upon request.