Never use an open flame; it’s a fire hazard and will shatter pipes.
Salt lowers the freezing point of ice, helping it melt faster. Pour about a cup of table salt or rock salt down the drain. Let it sit for 15–20 minutes. Follow up with hot (not boiling) water. External Heat (For Accessible Pipes)
You turn the handle, hot water cascades down… and then it doesn’t drain. Instead, it pools around your ankles, cold and ominous. If it’s the middle of winter and your shower is on an exterior wall, you’ve likely got a frozen drain trap. how to thaw a frozen shower drain
To avoid dealing with a frozen shower drain in the future, consider the following preventive measures:
Most showers have an access panel behind the wall (often in a closet or adjacent room). Open it to expose the P-trap. Never use an open flame; it’s a fire
Soak a thick towel in a solution of 1 part white vinegar to 2 parts very hot water. Wring it out slightly (it should be dripping but not soaking). Wrap the towel around the frozen trap. The vinegar helps lower the freezing point, and the towel holds heat against the pipe. Re-soak every 10 minutes for an hour.
To thaw a frozen shower drain, you'll need the following: Let it sit for 15–20 minutes
Position it near the pipe (keep a safe distance to avoid melting plastic). Electric Heating Pad: Wrap it around the frozen section.
Pour about 1/2 cup of rock salt or sodium chloride ice melter directly into the drain. Follow it with a quart of very hot (not boiling) water. The salt lowers the freezing point of water, accelerating the melt. Wait 15–20 minutes, then flush with more hot water.
Caution: Keep the heat moving to avoid melting PVC or plastic pipes. Electric Heat Tape: This ribbon-like wrap can be wound around exposed pipes and plugged in to provide steady, controlled warmth. Hot Water Bottles: Placing hot water bottles or freezer bags filled with hot water directly on the pipe is a safe, "no-tool" way to transfer heat without risk of fire or melting. YouTube +5 Critical Safety "Don'ts" Do NOT use boiling water: Pouring boiling water directly into a frozen pipe can cause "thermal shock," leading to immediate cracking or bursting. Do NOT use open flames: Torches or candles are fire hazards and can easily damage pipe joints. Do NOT ignore slow drainage: A slow drain in freezing weather is often a sign of an ice dam forming; address it before it freezes completely. Anytime HVAC +3 Prevention Tips Let it Drip: During extreme cold, allow the faucet to drip slightly to keep water moving. Add Insulation: Wrap exposed pipes in foam insulation or "heat trace" kits available at hardware stores. Household Warmth: Open cabinet doors or access panels to let room-temperature air reach hidden pipes. YouTube +5 Are you currently dealing with a
Before you start thawing, make sure it’s actually frozen. If the shower hasn’t drained for days but your sinks and toilet work fine, and the air temperature near the floor is below freezing, ice is likely the culprit. If it’s a slow drain that smells, it’s probably hair and soap scum.