Walker Industries manufactures Sewer Manholes with inside diameters of 2’, 4′, 5′, 6′ and 8’. All sewer manholes are designed and manufactured to meet ASTM C478, AASHTO, and DOT requirements. Sewer Manholes are wet cast in precision steel forms with integrally cast base sections. Pipe to manhole connections is placed as required. Top sections are typically cast as a cone or flat slab.
Residential Septic Tanks
Walker industries provides our Hawaii residents with precast septic tanks in 1,250 gallon and 1,500 gallons are designed to be strong, water-tight and environmentally friendly. Our septic tanks are listed in the Uniform Plumbing Code (UPC) which is published by the International Association of Plumbing and Mechanical Officials (IAPMO).