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Insulation and water temp

613 Views | 3 Replies | Last: 1 yr ago by htxag09
Garrelli 5000
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AG
Random question I've had for a while and finally remembered to post while I'm in front of my computer.

Is it normal lesser used faucets (think secondary bathroom) to have almost hot water from the cool line during the heat of the summer in a 1 story home? Or upstairs in a 2 story (closest to attic)?

During the summer several of my faucets have very warm almost hot water until everything that was hanging out in the line has passed. During snowmaggedon in 2021 I had an interior faucet in the powder bath (no exterior walls) freeze. No damage, but there was some puckering when things started to thaw to see if I suddenly had a shower head somewhere in the home that shouldn't.

This is our first 1 story home 15 years and I don't recall this in our first home. Granted that was a long time ago.

Subsequent homes have been 2 stories and I wasn't using the upstairs sinks during the day.

First home with pex plumbing instead of copper. I know the builder wrapped the hot lines with insulation tubing but left the cool untouched.


I've debated when the weather cools putting the insulation tubing around lines in the attick that are obviously visible, i.e. - spanning areas that they aren't going under the regular insulation. Not sure if the juice is worth the squeeze - it's a minor annoyance. Just wouldn't expect it in a new home with today's energy efficiency. It's a Huntington (Highland) in Frisco. Not bespoke custom 'quality' with 6 inch studs and blown insulation through every available nook and cranny, but by mass builder standards they're typicall well built homes.

Staff - take out the trash.
Jason_Roofer
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Yes. It's normal.

From a physics standpoint there is not such thing as "cold". There is only heat and heat moves from high to low. Any stagnant cold water in a line baking in a 120 degree attic will absorb that heat. Im on a well and a lot of my line is buried from the well to the house. The cold water line is hot until the water is flushed out. When I was using my 2000' water line that was buried 6" in the pasture, there was enough water in the 2" pipe to take a 25 minute uncomfortably hot shower from the cold tap.

Insulating your line will garner the benefit of preventing it from freezing so readily but you aren't going to gain much in the summer from the efforts.
Houston-Austin-Dallas-San Antonio - Infinity Roofing - https://linqapp.com/jason_duke --- JasonDuke@InfinityRoofer.com --- https://infinityrooferjason.blogspot.com/
Garrelli 5000
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htxag09
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AG
I've honestly never thought anything of this.....

But the other day I was talking to my neighbor, who's from the north, and we had lost power the day before. We were talking about generators and I basically said after I got everything going I went and took a cold shower to cool down and stop sweating, our generator isn't big enough for AC.

He responded basically saying lol cold shower.

I really noticed after that it's just a not as hot shower or water lol
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