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For extreme cold temperatures, has anyone tried to Plumb hot water through cold water lines to prevent freezing? (And a trickle of water flow of course) Other ideas to stop freezing without using heating tape? (I'm worried about fire)
 

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JUSTA MEMBER
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We need information, before we can advise you what to do.

Where are these pipes, kind of space, air leaks, available power supply, and many other factors.



ED
 

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retired painter
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I have a length of heat tape where my water line first enters my crawlspace that has been in service for 25+ yrs - no issues. In the past I have had heat tape burn up but never had any catch on fire.

When/where feasible insulation is best.
 

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Red Seal Electrician
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My floor insulation was never good, and was constantly busting into it for plumbing and electrical work. I decided it made more sense to tighten up the crawlspace perimeter and insulate it. I have enough heat from my woodstove, and air leakage with forced-air ducting that the crawlspace stays above freezing.
 

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If you have an unvented, insulated crawlspace, it would be advisable to install a couple of heat registers down there. You could also install a remote thermometer to alert you when the crawlspace temperature is approaching freezing,
 
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Just leave the hot and cold water running. Even cold water lines won't freeze if there's water running through them.
 

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Usually Confused
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For extreme cold temperatures, has anyone tried to Plumb hot water through cold water lines to prevent freezing? (And a trickle of water flow of course) Other ideas to stop freezing without using heating tape? (I'm worried about fire)
You mean like co-axially? I don't know how you would handle a watertight transition. As others have mentioned, insulation and pipe location is key.
 
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