subject: Requirements of a Effective Plumbing System [print this page] The main difference between a water supply system and the sewage system installed in a home is that the water supply system is only designed to make the supply of water with in the home while the sewage or drain system serve a group of buildings or a city if the wastes are going to a common drain tank. When it comes to care or maintain a plumber system it always is a good choice to seek the help of a plumbing professional. When the plumbing problem is a minor one then it needs not to go for the help of a plumber that we can solve these minor difficulties. But if the problem is a major one then we can go for the help of a plumber professional to maintain the plumber fixture system good for ever.