Because properly installed drain pipes do not have water standing in them and are usually connected to a septic system that generates sewer gas, drain pipes need less external protection than water supply pipes. But they can freeze. If they do, they can create great inconvenience. To prevent drain freeze-up , do not let water drip into the drains. Slow-moving and small quantities of water freeze when coming in contact with very cold sections of a drain system. As additional slow dripping runoff reaches that point, it freezes on top; the pipe will eventually be blocked by this glacier within. Water that dams up behind the glacier will also freeze, causing a very big problem. Enclosing and insulating the area under the house where drain pipes are located is highly recommended. Have West Michigan Septic Sewer and Drain Service inspect your home and insulate pipes to prevent freezing and other issues. Heat tapes work well on drain pipes if installed, thermostatic...