Manholes
Precast manholes provide reliable access to underground utility systems for inspection, maintenance, and flow control. At Spoerr Precast Structures, we manufacture and stock a range of manhole components designed for durability, proper alignment, and efficient installation.
Intro
Stock Manhole Bases
We stock precast manholes bases in the following sizes:
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32" Manhole Bases
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48" Manhole Bases
Built for strength and long-term performance, our bases provide a solid foundation for both storm and sanitary systems.
Risers
We offer multiple riser sizes to build structures to required height:
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16" Risers
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32" Risers
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48" Risers
Custom Risers are available. These allow for flexible installation and proper depth adjustment in the field.
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Grade rings are also available in both 24" and 26" ID:
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2"
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3"
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4"
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5"
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6"
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10"
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12"
These allow for precise adjustment to meet finished grade requirements.
Tops & Cones
We provide both flat and cone top options:
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6", 8" and 12" Flat Tops
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36" Cone Tops
Designed for proper load distribution and access, these components complete the structure and allow for surface integration.
Custom Manholes
We manufacture custom 48" manholes to meet specific project requirements:
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Custom Pipe Openings
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Adjustable Hole Locations
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Flow Channels Built to Spec
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Boot Connections
Our custom capabilities ensure each structure is built for proper flow, fit, and long-term performance.
How Manholes Work
Manholes provide access points within underground systems, allowing for inspection, maintenance, and connection of pipelines. They also help manage changes in direction, elevation, and flow within stormwater and sanitary systems.