HomeAll ProductsManholesManholesOur manholes are poured at 5,000 psi and reinforced with wire and rebar for maximum strength. Manholes can be created at any desired height, and holes can be placed at any elevation. Base inverts are also available.Manhole Sizes*weight and pricing depends on desired height4 ft manhole:flat lid & cone top available 5 ft manhole:flat lid ONLY