Here's 2 quick installation guide about the Steamrollers drain system. There are two ways to install the flexible hose to the house floor drains In order to determine the options, the customer have to first figure out if his/her floor-drain has a "P" trap. The "P" trap is a way to hold water in the piping that way it prevents sewage odor from coming back up into the house. Once you have confirmed that there's a "P" trap in the house drain, you have two options of installing the unit's flexible drain hoses.