If your pipes are frozen, you can't flush your toilet. Drain pipes that take out the toilet's wastewater are totally separate from the supply pipes, one of which brings water into the toilet. If the supply pipes are frozen, you can likely only flush the toilet one time, unless you manually add water.
Your pipes will eventually begin to thaw on their own once the temperatures rise above freezing.
Use a hair dryer on its lowest setting to thaw out frozen plumbing. Starting from a point nearest the toilet, direct warm air back and forth along the frozen pipe.
Water expands when its frozen (throw a bottle of water in the freezer and let it freeze, than unfreeze, you will see it deforms the bottle), and that expansion, plus the unfrozen water creates a lot of pressure on the pipe or ceramic, and can cause the toilet to break or crack, or the pipes to burst.
Pipe-thawing options: There are several things you can do to thaw your home's pipes. Here's a list: Probably the most popular and safest pipe-thawing option is to use hot water.
Pipes typically burst when exposed to extremely low temperatures for an extended period of time (anywhere from 1-3 days depending on temperature). This is especially true for pipes located on exterior walls. A frozen pipe is likely to burst when any water or liquid trapped within it freezes and begins to expand.
Frozen Pipes and Water Blockages
Frozen pipes are usually not a local problem — they typically lead to system-wide pressure failure and other problems. If water cannot move freely through other fixtures, the toilet may not flush properly, making it more susceptible to clogging.
This could be due to a variety of reasons, including frozen pipes or issues with the toilet mechanism becoming sluggish due to the cold. How to Address It: Check for any blockages in the pipes. If the pipes are clear, the problem might be with the toilet itself.
A foul smell from the drain or faucet is a less-obvious warning sign. Odors are unable to filter out of the frozen pipe and instead are forced back into the home's faucet. 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.
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.
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.
The Toilet Won't Flush Correctly
A clogged or slow-flushing toilet may be the result of a clog or a problem with the flush handle, flapper, lift chain or water level. If you have a clogged toilet, turn off the water supply valve as soon as you notice the toilet isn't flushing properly.
Your pipes will eventually thaw on their own, but this will take at least a few hours or potentially several days, depending on where the pipe is located and the air temperature around it.
Pipes will eventually unfreeze on their own naturally, but this takes far more time and before thawing occurs the freezing could become much worse. This could eventually lead to the pipe bursting and causing significantly more damage. It's better to proactively thaw a frozen pipe size than let it persist.
Apply heat to the section of pipe using an electric heating pad wrapped around the pipe, an electric hair dryer, a portable space heater (kept away from flammable materials), or by wrapping pipes with towels soaked in hot water.
All you have to do is manually dump a bucket of water into the bowl, and you've got your flush. One reassuring part of using the bucket method is that it doesn't matter what water you use since it's all going down the toilet anyway.
The main reason for a toilet tank not filling or filling slowly is due to the toilet fill valve. The most common reasons for the fill valve to slow down or no longer fill the tank after the flush are debris issues and the length of time a fill valve has been in use.
“Frozen water can cause the toilet to crack, while freezing in the pipes connected to the toilet can lead to blocked water flow and, in severe cases, even cause the pipe to burst due to the expansion of ice,” says Fleming.
Do Pipes Always Burst When They Freeze? Not all frozen pipes burst. However, thawing the ice can increase the risk, as it usually worsens the problem since it raises the pressure further. This is why pipe bursting is especially common at the end of winter when the ice starts to thaw.
If this is the case, feel your walls and ceilings to find it - the surface should feel cold if you have a frozen pipe. Once you have found it, turn up your thermostat and open the doors inside your home so that the warm air can reach the pipe. You could also use a space heater to apply direct heat to the affected area.
If your pipes freeze:
If you turn on your faucets and nothing comes out call a plumber. If you detect your water pipes have frozen, turn off the water at the main shut-off valve in the house. NEVER try to thaw a pipe with a torch or open flame.
During extended periods of very cold weather, sewer gas containing water vapor will condense, then freeze to form a frost layer in the exposed uninsulated end of the vent pipe. This frost layer can seal the pipe partially or fully, forming a plug. Hard, drifted snow also can plug the end of the vent pipes.
The fastest way to unclog a toilet is often by using a plunger. Plungers create suction that helps dislodge the blockage quickly. Alternatively, pouring hot water or a mixture of baking soda and vinegar into the toilet bowl can also provide fast results by breaking down the clog.