Simple steps you can take with drain pipes to avoid frozen pipes can also help prevent the repeated annoyance of a frozen drain. When freezing temperatures persist for a length of time—particularly when they are below 32 degrees Fahrenheit day and night—both water supply lines and drain pipes may freeze. Just as with any other type of drain blockage, a drain pipe that is obstructed by ice will not drain water freely.
Here are three things you can do to avoid frozen pipes.
- Insulate exposed segments. Anywhere you can access spans of drain pipe—such as in the crawl space or basement—cover these segments with foam pipe insulation. Supplied with a slit down the length of the segment, this slip-on insulation can be placed on the pipe without disconnecting the plumbing. Where the drain pipe goes underground in the crawl space, it’s a good idea to insulate the pipe at least twelve inches below the soil to reach the frost line—the point where the pipe is unlikely to freeze.
- Keep cold air away. Look for any gaps in the exterior wall of the house that allows frigid outdoor air to reach drain pipes and other plumbing routed inside the wall spaces or the crawl space. Small cracks can be sealed with exterior caulking. Larger gaps, such as those where plumbing pipes penetrate the exterior wall, can be filled with expanding spray foam insulation that comes in a can. Still bigger openings in the wall need to be permanently patched with wood or siding.
- Fix dripping faucets in the house. Drain pipes that don’t contain any water can’t freeze. Though drain pipes are typically installed in a way to empty all water into the main sewer line, one or more dripping faucets creates an ongoing presence of water throughout the span of the drain pipe. If temperatures drop low enough, the drain may freeze.
For more advice about what you can do to drain pipes to prevent freezing this winter, contact the plumbing pros at Apollo Home Heating, Cooling, Electrical and Plumbing.