If your pool equipment isn't winterized, water can freeze inside of your pump, filter or heater damaging these components so it's important to keep water flowing through your pool's system the entire time the temperature is freezing.
Run your pool pump continuously when temperatures are near or below freezing. You don't need to run your heater, moving water likely will not freeze. Disconnect any aerators and lines to slides. Booster pumps for pool cleaners don't need to run continuously.
If you have an above ground pool with the pool filter system and plumbing above ground (like nearly all above ground pools), pipes and pumps can freeze up in less than an hour of minus 32 degrees. The same is true for inground pool equipment that is not running when temperatures are below freezing.
Inground pool pipes will take 5 – 7 days of continuous temperatures below 32°F (0°C) to freeze up.
Information varies on how cold it has to be for pipes to freeze, but the freezing temperature of water is 32 degrees. So, theoretically, your pipes could freeze at any temperature lower than that. But for your pipes to literally freeze overnight, the temperature would probably have to drop to at least 20 degrees.
Pool pipes that are located above-ground can crack if the pump is not kept running when temperatures reach below 32°. If PVC pipes freeze, the ice will expand and can crack pipes, pumps, valves, filters, and heaters.
Water expands about 9% when it freezes, so use enough Air Pillows to cover about 10% of the pool surface area. Air Pillows, aka Ice Equalizers or ice compensators, are your best defense against ice damage.
Keeping your pool warm is the most effective way to avoid freeze damage, period. As long as you can keep your pool water moving, and at a constant temperature above the freezing point of 32 degrees, you're safe.
An Ice Filled Pool
When the water freezes in the pool, the expansion puts the pressure outward on the pool wall. When there is an air pillow in the water, the pressure is instead focused on the pillow, instead of the pool wall. Winter Damage On Above Ground Pools can happen without proper preparation.
Pipes can freeze at 32 degrees or below, but it will take a sustained period of time for this to happen. In other words, a pipe needs to be at freezing temperatures for at least half a day before homeowners have to worry about any freezing occurring.
When temperatures dip to 28 degrees or below, and the outside faucets freeze, ice can form in the water supply pipes that lead to those exposed outdoor faucets. If your outdoor faucets aren't properly prepared for winter, water damage from frozen pipes may occur.
PVC pipes are in danger of freezing when surrounding temperatures approach 20 degrees Fahrenheit. Ice begins to form and gradually blocks the pipe. This blockage causes a rise in water pressure.
The minimum temperature to keep pipes from freezing is 55° F. However, between 60° F and 68° F is a safer range. This way the air around your pipes is warm enough to keep them from freezing. If you live in a warmer climate, you should keep your above 68° because your pipes are not insulated against the freezing cold.
Even a single night of below-freezing temperatures is enough to freeze the water in a hose. Water in hoses can freeze once temperatures drop to 32℉ (0℃). Exterior hoses freeze much more easily than in-wall water pipes. A hose can freeze when exposed to 6 hours or more of freezing weather.
DURING freezing weather:
If you plan to be away from home for several days, shutting off the water can reduce the chances of broken pipes. Set your home heat to at least 55 degrees. Shut off water to the house and open all faucets to drain pipes; flush the toilet once to drain the tank, but not the bowl.
Plan to remove hoses and turn off the water to outside faucets 2 weeks before the first average fall freeze. In most regions with freezing winters, October or November is the best month to winterize your hoses and hose bibbs.
The filtration system cannot operate without the pump running. Remember as we say at PoolSide, clear water doesn't mean good water, but good water will be clear. Depending on the size of your pool, we still recommend you run your pump run at least 4-6 hours a day during the fall and winter months.
See, in most cases, your water pipes will start freezing when the temperature is within the range of twenty to thirty two degrees Fahrenheit. And since they need around six hours until they burst, this temperature rate can be considered the one at which your water lines will collapse.
Pipes can freeze in as little as six to eight hours, meaning they can freeze overnight. If the outside temperature is below 32 degrees F and your pipes are unprotected, your chances for a frozen pipe increase.
At what temperature does a pool freeze? Chlorinated and non-chlorinated pools freeze at the same temperature. However, salt water pools will freeze at a slightly lower temperature. It should also be noted that above-ground pools will generally freeze at a higher temperature than inground pools.
One of the earliest signs of a frozen pipe is when no water comes out of your faucet when you turn it on. If you notice that, head first to the basement and check to see that the water is still turned on and that you don't have a leak.
Even so, outside temperatures generally have to fall to about 20 degrees Fahrenheit or below before your pipes will freeze or burst due to freezing. Still, you might not want to wait for temperatures to fall that low before taking precautions to protect your pipes from freezing.