Frozen drain pipes might not happen quite as frequently as those related to water lines but you can still be left with a major mess on your hands.
Your pipes are at risk of freezing any time temperatures drop below 32°F. However, it's much more common for pipes to freeze when temperatures dip below 20°F. The longer the weather remains below freezing, the more likely it is your pipes can freeze if not properly protected and winterized.
A frozen drainpipe may usually be unfrozen by running hot water down it. Fill a half-gallon pot halfway with water and heat it on the stove. When it starts to boil, take it from the heat and pour it down the drain slowly. This may be enough to melt the ice and unclog your drain completely.
Frozen pipes will eventually thaw on their own, but it could take days or even weeks. If New York City is experiencing a brutal cold snap, the temperature could stay below freezing for many days. Meanwhile, the water in the pipes could be expanding.
The job goes more quickly by pouring hot water or a mixture of vinegar, baking soda and salt water down the drain. Space heaters, hair dryers and heating pads are highly efficient tools for unfreezing a drain pipe. If a frozen drain line ruptures, turn off your home's main water supply.
And once the temperature outside dips below 32F, unprotected pipes are at a greater risk of freezing and potentially bursting. That said, it's still possible for your pipes to thaw without bursting. The key is to release the pressure and allow the pipes to thaw slowly.
It will take roughly 30-40 minutes of using a heat source to thaw exposed pipes. If the pipes are enclosed it will take longer for heat to penetrate the insulation between your heat source and the pipe.
Thaw Frozen Pipes
Turn off the water immediately at the main shut off valve. Open the faucet so that water will flow through the pipe once the area is melted. This will help melt more ice.
Take every precaution to avoid frozen pipes–and if your pipes DO freeze, save yourself a headache by calling in a plumber with a thaw machine. Having tried everything else over the past week, I can confidently say that it's the only fool-proof solution.
While frozen pipes often burst because the water inside expands as it freezes, they don't always burst. However, the risk of bursting remains when pipes freeze.
When your sewer lines are exposed to a cold breeze, they can freeze and when it freezes, it can create cracks that can cause damage to your property. Make sure your outside vents are covered or sealed off if freezing temperatures are foretold.
Pour boiling water
Slowly pour boiling water down the drain. This will melt frost and allow the soda/vinegar concoction to penetrate deeper into to pipes. Make sure you have enough boiling water to maintain the flow for some time. Don't dump all of the water into your frozen drain at once as that will be ineffective.
Set faucets to a small, steady drip rather than a stream to conserve water while preventing freezing. Drip the faucet farthest from your home's main water valve. “You don't have to drip them all—one or two is fine,” Sperlich told USA TODAY.
Yes, pipes can freeze overnight if temperatures plummet drastically. Uninsulated pipes in unheated areas like attics or exterior walls are most vulnerable.
In most instances, pouring hot water down the drain will unfreeze drain pipes. However, it's essential to take your time with this method to increase its effectiveness and ensure your safety.
No water or a slow trickle when a faucet is used. Whistling and banging coming from pipes, or strange bubbling sounds when you flush a toilet. Dampness, puddles, or rings on drywall or ceilings—signs of an urgent issue.
Don't dump any chemical drain cleaners down either, as it likely won't make it through the frozen blockage and it will just sit in the pipe. The acid from it could start to corrode over a short time. If you want to take some boiling hot water and dump that down, it could potentially help a minor problem.
Apply heat to the frozen area
There are several ways to do this. You can wrap the pipes in thermostatically controlled heat tape, or you can use an external heat source such as a hair dryer or space heater.
If your pipes have been frozen for more than two days, shut down your home's water supply. Locate the frozen length using touch, sight and sound. Make sure the pipe hasn't burst, and open indoor faucets. Unfreeze the pipe using a hair dryer, heat tape, space heater or heating pad.
Simply pour a handful of salt down your drain pipe, quickly followed by boiling water. Alternatively, boil the water in a saucepan and stir the salt in the boiling water. Once the salt has completely dispersed, carefully pour it down the drain.
You will likely pay around $350 to $650 to have a plumber unclog a main sewer line unless you have complications like serious damage to the line.
Mix 1/3rd of a cup of bicarbonate of soda with 1/3rd of a cup of vinegar in a measuring cup. It will fizz immediately, and you should waste no time pouring it down the clogged drain. The fizzing action will help to remove the gunk, hair, and grime that has built up in the blocked drain pipe.