Maintenance Holes

maintenance hole

Uses

Precast Circular Maintenance Holes are used in:

Sanitary sewer and storm drain systems for access, observation and junctions.
Pump stations, wet wells, stormwater management structures and overflow structures.

Precast Circular Vertical Structures are used for pump stations, wet wells, stormwater management structures and impoundment overflow structures.

SIZES

Precast Circular Maintenance Holes are normally available in diameters of 1200mm through 3600mm.

Application

Precast Circular Maintenance Holes can be used for the following:

Access to the system for maintenance.
Changes in pipe size.
Observation points.
Changes in pipe shape.
Changes in direction of pipe.
Junctions for multiple pipes.
Catch Basin Maintenance Holes.
Wet wells.
Sanitary or stormwater pump stations.
Overflow structures for ponds.

Precast Circular Maintenance Holes can be provided with the following features:

Protective linings.
Flexible watertight pipe-to-manhole connections.
Custom openings.
Custom flat caps.
Precast invert channels.

JOINTS

The following joints are normally available for Circular Manholes and Vertical Structures:

Single-offset with profile rubber gasket.
Confined O-ring rubber gasket.
Preformed mastic or butyl gasket.

Applicable Specifications

The following specifications apply to precast circular manholes:

CSA Standards CAN/CSA A257.4 Precast Reinforced Circular Concrete Manhole Sections, Catch Basins and Fittings.

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