Large concrete cylinder with text "3000 X 1.2" and "Miller Precast." Industrial background, steel beams visible, outdoors on muddy ground.

Maintenance Holes

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
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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

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