Manufacturing standards

Absolute Concrete Manholes are manufactured to pipe standards NZS 3107:1978 and precast standards
NZS3109:1997 with surface finishes to NZS 3114:1987. They are manufactured using high strength
concrete and fabricated circular steel reinforcement to achieve a manhole suitable for standard
installations and have lifting anchors cast into the concrete walls. The flanged bases and riser sections
are steel reinforced so there is no need for preformed holes or knockouts allowing for entry and exit
punch outs to be made to whatever size required, just prior to installation.