There’s nothing worse than stepping into a freezing cold bathroom, ready to run a hot bath, only to find the water rising around your ankles. A frozen bath drain is a common winter plumbing headache, especially in older homes or bathrooms on exterior walls.
But don’t panic—and absolutely don’t pour boiling water down the drain (that can crack pipes). Here’s how to safely thaw a frozen bath drain and prevent it from happening again. frozen bath drain
If your tub is on the second floor with exposed pipes below (crawlspace or basement), aim a space heater or hairdryer directly at the trap—the U-shaped bend under the tub. This is where ice usually forms. There’s nothing worse than stepping into a freezing
Fill a hot water bottle (not boiling) and press it directly over the drain opening. Alternatively, pour ½ cup of rock salt or table salt into the drain—salt lowers the freezing point of water and can slowly melt the ice. Here’s how to safely thaw a frozen bath
Once you see slight drainage, slowly pour warm water—not boiling—down the overflow plate or drain. Start with a cup at a time. Boiling water can shatter PVC or crack old metal pipes.
A frozen bath drain is frustrating, but in most cases, patience and gentle heat will solve the problem. Start with a hairdryer, avoid boiling water, and warm up the room. Once it’s flowing again, take a few simple prevention steps so you won’t be stuck with a frozen drain during the next deep freeze.
Set a hairdryer to low/medium heat. Direct the warm air at the drain and the pipe area beneath the tub (if accessible). Keep the dryer moving—never concentrate heat on one spot. This can take 10–20 minutes, but it’s very effective.