Importance of Manholes

Manholes are an important part of a wastewater collection system. They allow access to the sewer line, they join together sewers, align and/ or change the flow direction, as well as provide ventilation so gases & odors can be released from the sewer lines. They provide access in order to clean, inspect, maintain and rehabilitate sewer lines but unfortunately, if manholes are not properly maintained, they will contribute to an excessive amount of I & I (inflow and infiltration) which leads to the deterioration of that same wastewater collection system. 

There are a wide range of ways to rehabilitate or seal manholes in order to eliminate these leaks. There are 3 main types of rehabilitation options:  cementitious mortar linings, polymer linings and cured-in-place manhole (CIPM).

Cementitious Mortar Lining

These linings can be installed quickly, and though they require stopping infiltration and cleaning the manhole, they do not require the structure to be completely dry.

Reliner MSP Cement

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Strong Seal MS-2A

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Mainstay ML-10

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Parson MH Liner

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Product data sheet

GeoKrete Geopolymer

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Permacast MS-10,000

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Polymer Lining

Spray- or hand-applied polymer linings include epoxies, polyurethanes or polyureas.

Sauereisen
SewerGard 210T Epoxy

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Standard Cement
4553 Epoxy

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SpectraShield
Barrier Coat

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Sherwin Williams
DURA-PLATE 235

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Raven 405 Epoxy

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OBIC 5000

See OBIC website for more information.

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SprayWall Polyurethane Lining System

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Cured-in-Place Manhole (CIPM) Lining

CIPM lining is a solid liner that is made up of a felt tube saturated with resin to form a solid liner. This method works well with any size and shape manhole and is water resistant.

TriPlex CIPM Liner

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ALT CIPM Lining System

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