1200 dia., 1500 dia., 1800 dia., 2100 dia., 2400 dia., and 3000 dia. (OPSD and City of Thunder Bay spec)
1200 dia. manholes available pre-benched.
Accessories include boot gaskets, rough openings, interior or exterior coatings, safety platforms, grade rings, galvanized, aluminum, or stainless access hatches, ladders, and vent pipes, etc.
Produced to CSA A257.4