To Unclog Frozen Drain Pipes - How

Before applying heat, relieve pressure. A frozen drain line is a closed system; melting the ice creates liquid water that has nowhere to go.

Set it to medium heat. Wave it back and forth along the frozen section, starting at the end closest to the faucet and moving toward the main stack. This allows meltwater to drain away rather than refreezing behind the plug. Expect this to take 20–60 minutes. how to unclog frozen drain pipes

Once the frozen section is identified, the process of thawing can begin. This is the stage where caution is paramount. The instinct to apply high-intensity heat quickly must be resisted. Using an open flame, such as a propane torch, or extreme heat sources can quickly damage plastic (PVC or ABS) pipes, leading to cracks and leaks, or can warp metal pipes at their joints. Instead, gradual, indirect heat is the gold standard. Before applying heat, relieve pressure

Mix 1 cup of rock salt into 1 gallon of warm (not boiling) water. Pour slowly into the drain. The salt lowers the freezing point of water, helping to break down the ice plug. Do not use this on PVC or ABS pipes —the salt crystals can scratch the interior, creating future clog points. Wave it back and forth along the frozen

A frozen drain pipe is a unique winter nightmare. Unlike a frozen supply line (which threatens to burst and flood your home), a frozen drain line is quieter. It starts with a gurgle, progresses to a slow trickle, and ends with a complete standstill. You turn on the sink, and the water simply sits there, refusing to leave.

Before you begin, confirm you are dealing with ice, not a standard blockage.