construction of stormwater pits, sanitary sewer system distribution chamber and pump station. sewerage manhole and pipes line

basins building bunker catch chamber column concrete construction culverts digg digging ditch drain drainage formwork gate ground hole household installation manhole meter pipe pipeline pipes pit plumbing pouring pump pumping rainwater reinforcement sewage sewer sewerage site station storm sub system systems tank terrain treatment trench underground valve vault walls water waterproofing