Heat tape is a thermostatically-controlled electrical cable that you wrap around your pipes to keep them warm. While often used as a preventive measure, it can also be used to actively thaw a pipe. Buy and follow the manufacturer’s installation instructions explicitly. Never overlap the tape on itself, as this can cause overheating and a fire.
Some freezes are beyond DIY. Call a licensed plumber immediately if:
: Keep kitchen and bathroom cabinet doors open to allow warm indoor air to circulate around the plumbing. Infrared Lamps how to unfreeze a drain pipe 2021
Pipes running through unheated crawl spaces, basements, or attics are highly vulnerable.
Wrap vulnerable lines in foam pipe insulation sleeves or use electrical heat tape. Never overlap the tape on itself, as this
Wrap exposed drain lines in unheated areas (crawlspaces, attics, basements) with foam pipe insulation sleeves or fiberglass wrap.
specific types of outdoor or crawl-space pipes for the winter? Infrared Lamps Pipes running through unheated crawl spaces,
For internal blockages, a chemical reaction can generate mild heat and lower the freezing point of the ice:
If your main sewer line or an underground drain pipe is frozen, DIY household methods like hair dryers will not reach it.
If you can access the pipe (e.g., under a sink or in a crawl space), apply gradual external heat: American Red Cross Hair Dryer or Heat Gun:
: Wrap an electric heating pad or specialized UL-listed heat tape around the pipe. This provides a steady, safe temperature. Hot Towels