precast concrete Manholes

Precast Concrete Manholes for Reliable Water Management

Around the world, precast concrete manholes play a vital role in protecting groundwater and surface water by safely conveying sewer and stormwater. Known for their watertight performance, exceptional strength, and versatile design, they are trusted solutions for even the most demanding environments and applications.

At Gillespie Precast, we go beyond industry standards. Our manholes can be manufactured with precision flow channels designed to accommodate diameters of up to 96 inches. This capability sets us apart, allowing us to deliver solutions for large-scale infrastructure and complex projects where reliability is critical.

Engineered for durability and efficiency, precast concrete manholes provide long-term value with reduced maintenance and installation costs. When strength, performance, and cost savings matter most, Gillespie Precast delivers manholes that exceed expectations.

Key Benefits of Gillespie Precast Manholes

Our precast manholes offer these key advantages for sewer and stormwater systems:

  • Built to ASTM C 478 standards for strength and watertightness
  • Equipped with sealants and gaskets designed for precast concrete
  • Watertightness easily verified with ASTM C 1244 vacuum testing
  • Delivers long-term, low-maintenance performance
  • High specific gravity (2.40) resists buoyancy better than fiberglass or HDPE
  • Removes the need for costly tie-downs used with lighter materials
Sanitary Sewer Product Line
Gillespie Precast Flow Channels Available in 48” to 96” Manholes
Gillespie Precast Custom Design Manholes

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