Tub Drain Frozen -

Nearby fixtures like the bathroom sink or toilet drain normally, but the tub or shower remains completely backed up.

Ice expands as it freezes. This expansion exerts tremendous pressure on pipe walls. If your drain pipe is older cast iron or thin plastic, the ice may have cracked the pipe or separated a joint. tub drain frozen

The answer lies in where the drainpipe actually runs. The drain from your bathtub doesn't go straight down into the warm basement. Instead, it typically: Nearby fixtures like the bathroom sink or toilet

On exceptionally cold nights (below 20°F/-6°C), let the tub faucet drip slowly. let the tub faucet drip slowly.