Small Diameter Manholes
Small diameter manhole risers are available from 20″ Ø to 36″ Ø and are used for septic tank/cistern risers. Bases in each size are also available to use for sanitary or storm applications.
Click on sizes below for pdf Manhole Drawings.
Standard Small Diameter Manholes:
Grade Shims are available in 24″ Ø , 30″Ø , 36″Ø and 41″ Ø.
Other sizes and custom orders available upon request. Call for more details 970-669-0535 or email to request a quote info@coloprecast.com
