When purchasing a water filter system, the installation of the system is important. Some of the things to look for on the main line systems are drain pans. As you can see from the picture, most of the water filter system can be placed in a pan with a drain pipe to the floor drain. You often see this on a water heater. Not all floors are sloped to the floor drain. Structural wood floors do not like water. Thank You, Mike at 303-469-7873 or 303-How Pure