: Open the faucets connected to the drain. This allows steam and melting water to escape as you work. Safe Thawing Methods Always work from the faucet end toward the blockage .
Avoid using chemical drain cleaners on frozen pipes. The ice blocks the chemical from reaching the clog, and the liquid may freeze around the ice, making the problem worse. Additionally, some chemicals generate heat that can damage pipes or release toxic fumes if pressure builds behind an ice plug. clearing frozen drain pipes