Drainage Pipe & Products

Products

Storm and Sanitary Manholes

Precast circular concrete manholes are used in sanitary sewer and storm drain systems for access, observation and junctions. They are a good choice for:

  • pump stations
  • wet wells
  • stormwater management structures

All manholes and vertical structures can be provided for highway, railroad or aviation loading.

Applications

Precast circular manholes can be used for the following:

  • access to the system for maintenance
  • observation points
  • changes in pipe size
  • changes in pipe shape
  • changes in direction of pipe
  • junctions for multiple pipes

Precast circular vertical structures can be used for the following:

  • stormwater management or best-management-practice structures
  • overflow structures for ponds

Precast circular manholes and vertical structures can be provided with the following features:

  • precast invert channels
  • protective linings
  • flexible watertight pipe-to-manhole connections
  • custom openings
  • custom tops

Sizes

Precast circular manholes and vertical structures are normally available in diameters of 48 inches through 144 inches.

Joint

The following joints are normally available for precast 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:

  • ASTM C478 / AASHTO M199 — Precast Reinforced Concrete Manhole Sections
  • ASTM C443 — Joints for Circular Concrete Sewer and Culvert Pipe Using Rubber Gaskets
  • AASHTO M198 — Joints for Circular Concrete Sewer and Culvert Pipe Using Flexible Watertight Gaskets
  • ASTM C923 — Resilient Connectors Between Reinforced Concrete Manhole Structures and Pipes
  • ASTM C1244 — Standard Test Method for Concrete Sewer Manholes by the Negative Air Pressure (Vacuum) Test
Grounded In Strength