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You answered you own question: at freezing.

At or near 32 degrees F your pump should be turned to keep water moving. moving water doesn't freeze.

It is important that any exposed pipes, filter and pump have moving water at freezing as this water will freeze first and cause the item to crack. That's expensive as compared to the few cents it costs to operate the pump.

Water starts to freeze at 32 degrees. So it best to turn pump on at approx. 35 degrees & leave on until the tempt. rises to 35

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โˆ™ 2015-07-15 21:40:54
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Q: At what temperature is it necessary to turn on the pump to keep pipes from freezing?
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Related questions

What is a Safe house temperature to keep pipes from freezing?

At least one degree above freezing?

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How do you keep outside pipes from freezing?

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What temperature does indoor plumbing freeze?

Assuming you don't mean water heating systems, and just mean normal fresh (drinking) water systems, then they freeze at 0 degrees Centigrade like all water. But in the case of for example a home, the plumbing protected from freezing in a few different ways. Firstly most homes that are lived in have some form of heating, so this keeps the ambient temperature of the water in the pipes above freezing. Pipes that are in places more likely to be exposed to freezing, such as lofts, and roof cavities will be insulated with pipe lagging to protect them from freezing. Plus remember those pipes in roof cavities will benefit from heat rising from the home/building, helping to keep those pipes above freezing. If the subject of your question is in relation to 'burst' pipes caused by frozen water in the pipes expanding and literally tearing the pipes apart, then this will start to happen at about 20 Degrees Fahrenheit or -6 degrees Centigrade. Remember that a little freezing is not a major problem, as plumbers sometimes use special freezing kits, that will freeze a short section of pipe to block it off temporarily, while they work on the pipes.

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If your pipes freeze and burst, the damage could be extensive, and the repair could be costly. If your home has exposed pipes, wrap them in heat tape. That way, when the weather gets very cold, the heat tape will warm the pipes and keep them from freezing. Even if your area does not usually have hard winters, make sure to protect your pipes just in case. You could have an unusually cold winter. Remember to insulate any pipes in your garden as well. These pipes can cause damage if they freeze, even if they are far away from your house.

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There's a handy article on the Liberty Mutual Solutions site with tips on how to prevent your pipes from freezing when the temperature outside drops. Here are a couple of highlights: -If water supply lines are in your garage, keep garage doors closed. -If you're going away during cold weather, leave the heat on in your home, set to a temperature no lower than 55ºF You can find some more crucial prevention tips in the full article included in the related links below.

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It will certainly not keep the water in the bucket from freezing and, if the temperature goes low enough, the bottled salt water will also freeze.

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