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Old 10-25-2012, 05:14 PM   #1
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cold damage - at what temp?


At what temperature do I need to be concerned about damage to pipes and valves? 32F? 38? 40? 45? I'm not just concerned about pipes bursting. I am worried about valves that leak as well. I am going to buy a cheap Chinese temperature logger. Probes and records the temperature every 2 hours. My question is what temp do I focus on as a temp below which I should be concerned?

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Old 10-25-2012, 05:20 PM   #2
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cold damage - at what temp?


32 is freezing, anyhting above water is water.

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Old 10-25-2012, 05:20 PM   #3
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cold damage - at what temp?


Why not just winterize the whole system and not have to worry about it?
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Old 10-26-2012, 04:30 PM   #4
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cold damage - at what temp?


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Originally Posted by joecaption View Post
Why not just winterize the whole system and not have to worry about it?
Define winterize? Are you referring to the heated pipes? I'm worried about regular bathroom faucets and pex valves.

I need to keep a stand alone 8x10 bathroom at a temperature inside that will prevent damage. The question is what is that temperature? I have seen 120V plugs with temperature switches that turn on at 35 and off at 45. Is that sufficient? I have read or heard somewhere that damage can occur at 40. I'm not clear regarding the exact temperature. That's the question.
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Old 10-26-2012, 05:36 PM   #5
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cold damage - at what temp?


What is the coldest temp your unknown area sees durring the winter? As was said earlier water freezes below 32 deg and ice melts above 32 deg. If the air around the pipe hits 32 deg it will take some time before the pipe freezes solid. If this room will be heated then I see no reason why it would be a problem in there. The pipes where they come into the room from the outside will have to be protected somehow. If someone told you that water causes damage at 40 deg they are feeding you a line. For proof, fill a glas with water and a lot of ice cubes. Stick a thermometer in and watch the temp. I doubt you will see any damage when it hits or goes belw 40 deg
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Old 10-26-2012, 07:41 PM   #6
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cold damage - at what temp?


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What is the coldest temp your unknown area sees durring the winter?
In 1949 it was 3F Typical for winter is 20F 3-5AM 70-80F 11AM-3PM
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Old 10-26-2012, 08:03 PM   #7
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cold damage - at what temp?


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Originally Posted by pwgsx View Post
32 is freezing, anyhting above water is water.
It's not that simple. See link below.

http://hyperphysics.phy-astr.gsu.edu...erdens.html#c2

4C = 39.2F
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Old 10-26-2012, 09:00 PM   #8
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cold damage - at what temp?


you have 32F ice and 32F water the change of state is the loose of heat there wind chill has to be considered that will quicken the state of change on that water to ice.uninsulated pipe on an exterior wall with the wind blowing
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Old 10-27-2012, 08:25 AM   #9
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cold damage - at what temp?


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Originally Posted by jackwashere View Post
It's not that simple. See link below.

http://hyperphysics.phy-astr.gsu.edu...erdens.html#c2

4C = 39.2F
You are reading way too much into this. Water above 32 Deg will cause NO damage to pipes. IF the water in the pipes freezes solid then there is a chance the pipe could crack. I have had several frozen water pipes here in western NY over the years...probably 30-40, and only on a hand full of times has there been any damage. Trust me...20 deg for a couple hours is nothing. Put a minus sign i front of that temp and then start to worry. wrap the exposed pipes to keep the heat in and stop worrying about it. If it gets to the point that you might freeze a pipe, leave a faucet open at a trickle to keep the water moving

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