Keays Civil Engineering design package allows users to draft road, stormwater drainage, gravity sewerage and water supply designs.

Microtunnelling: Or Microtunneling equipment for installation of pipelines to exacting grade and line as used in gravity sewerage or drainage systems.

Missing incline of the ground, unfavourable soil (rocky or swampy grounds) and high groundwater table (with the necessity of dewatering trenches) lead to enormous investment costs in regards to gravity sewerage systems.

Maintenance costs of gravity sewerage systems generally relate to clearance of blockages and restriction of infiltration which can result from root intrusion at joints, faulty pipe and joints and loose manhole branch joints.