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UNDERGROUND

Manholes

Manhole risers with the NPCA Certified Plant logo painted on them are stacked in a product yard.

Precast concrete manholes are an integral component of any modern sewer system. Manhole sections are produced in a controlled environment, thus exhibiting high quality and uniformity. A properly designed and installed precast concrete manhole system provides superior watertight performance and will provide the long-term solution you need.

Standards

ASTM C 443: Specification for Joints for Concrete Pipe and Manholes, Using Rubber Gaskets

ASTM C 478: Specification for Precast Reinforced Concrete Manhole Sections

ASTM C 497: Test Methods for Concrete Pipe, Manhole Sections, or Tile

ASTM C 877: Specification for External Sealing Bands for Concrete Pipe, Manholes and Precast Box Sections

ASTM C 923: Specification for Resilient Connectors Between Reinforced Concrete Manhole Structures, Pipes, and Laterals

ASTM C 990: Specification for Joints for Concrete Pipe, Manholes, and Precast Box Sections Using Preformed Flexible Joint Sealants

ASTM C 1244: Test Method for Concrete Sewer Manholes by the Negative Air Pressure (Vacuum) Test Prior to Backfill

AASHTO M 199M/M 199-05: Precast Reinforced Concrete Manhole Sections

AASHTO T 280: Concrete Pipe, Manhole Sections, or Tile

CSA A257.4: Precast Reinforced Circular Concrete Manhole Sections, Catch Basins, and Fittings

CSA A257.3: Joints for Circular Concrete Sewer and Culvert Pipe, Manhole Sections , and Fittings using rubber Gaskets

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