If you want to build or buy a house, especially in any area where it is wet or prone to basement flooding, an important aspect of your house will be the surrounding drain pipe.Perimeter—or French—The drain pipe is basically a drainage ditch covered with gravel, with the aim of diverting water from specific areas such as the foundation.While French drains used to be built with spaced tiles, they are now usually built with perforated plastic pipes that can deliver larger volumes of water, and allow the entire length of the drain to the pipe.The purpose of setting up a peripheral drain around your foundation is to absorb the water, otherwise the water will surround the Foundation and the wick and may produce a very damp basement or crawl space.The properly constructed external peripheral drain pipe should be lower than the bottom so that the water cannot be moved up and through the wall by capillary action.There is also an internal perimeter drain that can also be installed in the interior perimeter of the basement.The idea of the internal drain is that, unlike the external peripheral drain, there is no dirt and sediment blocking it, so it does not need to be blocked after years of use because it is inside, any repairs are easy to carry out.Many of these internal drains are basically just a gap around the basement wall, allowing the water to be collected from the water seepage, and any humidity can be dripped down from the concrete wall.The biggest problem with this system is that it produces a lot of water at home and can cause mildew problems.The internal drain can also be built with a new type of French drain system, which is mounted around the interior of the basement wall and then covered with cement.The design allows the water to drip through the side or collect in the pipe, and draw away through the sewage pump, while avoiding excessive moisture problems at home.The water is discharged from the basement through the sewage pump;This pump is connected to the electrical system of the home, but there should also be spare batteries.The sewage pump should be maintained once a year to make sure it works well.The homeowner should provide you with any information about the state of the flood or drainage system.The more you know about the existing drainage system, the more ready you will be in case you need to make any repairs to it after you live at home;The more you know about the drainage system, the better information you get when you put one in the house you are building.