Plugs and Caps
Manufactured by Co-Pipe Products, Inc.
Precast Concrete plugs and caps sizes 12"-120"
Drainage and Sewer Works | Maintenance Hole, Catch Basin, Ditch Inlet Units and Valve Chambers | Concrete, Precast
American Society for Testing and Materials
ASTM C478M-15 - Precast Reinforced Concrete Manhole Sections (Metric)
Canadian Standards Association