Manholes

Across the globe, the quality of groundwater and surface water relies on precast concrete manholes to efficiently convey sewer and stormwater while preserving water quality. Renowned for their superior watertightness, unmatched strength, and exceptional design versatility, these manholes are the trusted solution for even the most demanding applications — no matter how challenging the environment.

At Gillespie Precast, we take it a step further by offering manholes with flow channels designed to accommodate flow channels up to 96 inches in diameter. This unique capability sets us apart, ensuring we can meet the needs of even the largest and most complex projects.

Precast concrete manholes deliver unmatched strength, reliability, and cost savings, making them the clear choice for even the toughest applications.

Benefits & Features

Manufactured to meet ASTM C 478 standards for quality and watertightness.
Features standard sealants and gaskets specifically designed for precast concrete.
Easy to verify watertightness through vacuum testing per ASTM C 1244.
Offers long-term, maintenance-free performance for sewer and stormwater systems.
High specific gravity (2.40) provides exceptional resistance to buoyant forces, outperforming alternatives like fiberglass (1.86) and HDPE (0.97).
Eliminates the need for tie-downs required by lighter materials, reducing project costs.

Standard Drawing Downloads

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