RCP & Precast Concrete

Manholes

by Northwest Pipe Company

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Our precast concrete manholes are available in many sizes and install quickly on the jobsite. With numerous design options, we manufacture our precast manhole sections as wet wells, junction structures for pipe and vaults for water valves. NWPX Geneva meets the needs of most sanitary sewer and storm drain systems specifications with manhole in sizes from 48” to 120”. All are designed to meet the varying load requirements required by highway, aircraft, and railroad specifications and offers invert channels, flexible pipe to manhole connections, custom hole openings, and custom lids. Our manhole units are easy to install, but even more importantly, provide safe access and entry into storm drainage and sanitary sewer systems. Work in these confined spaces can be challenging and hazardous. Our manhole systems provide necessary structural integrity that will keep your sewer and storm drain system and employees safe for decades to come.