Aim a hairdryer at the affected pipe section. Move it back and forth to distribute heat evenly.
Once you have restored water flow through the previously frozen drain pipe, your work is not yet complete. Take these post-thaw steps to ensure the pipe is fully functional and undamaged:
Never use a blowtorch or propane heater. This is a severe fire hazard and can cause the pipe to explode or melt. how to unfreeze a drain pipe 2021
Dealing with a frozen drain pipe in 2021—or any winter season—requires quick action to prevent the immense pressure of expanding ice from bursting your pipes. Whether the blockage is in an accessible P-trap or hidden behind a wall, 1. Identify and Prepare
Use foam pipe insulation on all exposed pipes in unheated areas. Aim a hairdryer at the affected pipe section
Leave a tiny trickle of water running during sub-zero temperatures to keep water moving.
An ounce of prevention is worth a gallon of thawing. Here’s how to protect your drains next winter: Take these post-thaw steps to ensure the pipe
If a faucet is connected to the frozen drain line, keep it open. As the ice melts, water and steam need an escape route to prevent the pipe from bursting. Effective Thawing Methods (DIY)
Unlike pressurized water supply lines, drain pipes are not always full of water. They freeze when water sits stagnant in a low spot or when the pipe has a shallow slope. Common culprits include:
: Aim a hair dryer at the frozen section of the pipe, keeping it moving to distribute heat evenly. This is ideal for indoor pipes located under sinks or in basements.