A clean-out is important for all systems. Installing a clean-out at the wall outside the home or business is a good idea if the system ever needs to be jetted or cleaned. The clean-out allows all this work to be done outdoors, so any mess stays outside. Inside the home, there is potential for the clean-out to be hidden and the possibility of a major spill. They can either be one direction to clean the pipe either forward or backward, or two directional to clean in both directions.
