The hot water usually freezes on the outside of the pipe and the torch can cause frozen.

Pouring hot water on frozen pipes. Unless the frozen point is very close to where you are pouring the boiling water. Freezing pipe to repair it. With a frozen shower drain or frozen bathtub drain, please follow these steps to thaw it with baking soda:

Use a space heater, heat lamp or hair dryer to thaw the frozen. B oil about a gallon of water and start pouring in salt until it no longer dissolves. Once you’re finished, toss that hot and salty water down the drain, where it will hopefully thaw.

Turn up the thermostat, and circulate warm air through every room by leaving interior doors open. Keeping the faucets open will help relieve pressure and allow the water to escape once the pipe begins to thaw. When temperatures plunge, let faucets drip to prevent hot and cold.

In most cases, you can unfreeze a frozen drainpipe by pouring hot water down it. Pour salt into the hot water until you see that the salt is not dissolving. Slowly pour a half cup of baking soda down the shower drain and let it sit for.

In most cases, you can unfreeze a frozen drainpipe by pouring hot water down it. It’s much more of a risk if you pour boiling water down empty pipes (and it doesn’t matter if they’re cold or not if the pipes are a plastic type). For short strands of pipe partially blocked, and very hot water, it might.

While it might seem like a good idea, in theory, to pour hot water down your pipes to unfreeze them, it likely won’t yield the results you’re hoping for. Frozen pipes will be full of ice. Freezing water can cause pipes to crack from.