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Run hot water for 30 seconds. If no water comes out of the vent on the roof, but the sink backs up immediately, the freeze is likely near the fixture.
Before applying heat, open the faucet(s) connected to the frozen drain. This: frozen drain pipes what to do
Once you’ve identified the frozen drain, choose the method that best fits the location of the pipe. Run hot water for 30 seconds
Ice blockages can trap sewer gases, forcing them back up through the drain and into your home. Immediate Steps: What to Do This: Once you’ve identified the frozen drain, choose
| Don’t | Why | |-------|-----| | Use a blowtorch or propane heater | Melts PVC/ABS, starts fires, can explode trapped gases | | Pour boiling water into a toilet | Cracks porcelain | | Leave a space heater unattended | Fire hazard | | Flush the toilet repeatedly | Can flood the bathroom if drain is blocked | | Use a drain snake aggressively | Can puncture a weakened frozen pipe |