Maintain Heat: Keep your thermostat at a consistent temperature, even at night.
Detecting a frozen drain early can save you from a major flood. Look for these red flags:
A bathtub drain consists of two main parts: the visible strainer inside the tub and the curved pipe beneath it—known as the P-trap—which holds a small amount of water to block sewer gases. Freezing typically does not occur in the tub itself, since indoor temperatures remain above freezing. The risk lies in the pipe downstream. If a home has poor insulation, if the bathroom is on an exterior wall, or if the crawlspace or basement is unheated, cold air can seep in. When temperatures drop well below freezing for an extended period, the standing water inside the P-trap can turn to ice. can a bathtub drain freeze
Pouring boiling water down the drain is a common instinct, but be careful. If the pipe is extremely cold, boiling water can cause porcelain to crack or PVC to warp. Use hot (but not boiling) water mixed with a cup of salt. Salt lowers the freezing point of ice.
Hot Wet Towels: Wrap the frozen section of the pipe in towels soaked in hot water, replacing them as they cool. How to Prevent Future Freezes Maintain Heat: Keep your thermostat at a consistent
While usually recommended for faucets, a very slow drip in the tub can keep water moving through the drain, making it much harder for ice to form a solid plug.
If the ice has pushed the water out of the trap or cracked the pipe, sewer smells may begin to drift into the room. How to Safely Thaw a Frozen Bathtub Drain Freezing typically does not occur in the tub
Drafts: Small gaps in your home’s exterior can let in "jets" of freezing air that hit the pipe directly.
Insulate Pipes: Use foam pipe sleeves or fiberglass wrap on any exposed drain lines.