Decide on the precise number of water taps you want inside and outside the house before starting the plumbing work. The pipes required for gardening, for washing, for farming, for sewage should also have predetermined positions. This will eliminate unnecessary and unexpected expenses. So sketch a plan with the help of a plumber. Keeping this schematic safe will offer an easier finish to any future maintenance works. The pathways and holes for pipes should be constructed during the initial phase itself. Place beams over this. This will speed up the maintenance works. Waste water should be given a specified pathway for drainage.