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How does the water inside pipes get so cold? #4617286
12/28/17 10:41 PM
12/28/17 10:41 PM
Joined: Nov 2009
Posts: 5,171
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 5,171
Houston, Texas
You know when it's cold outside and you take a shower and the first 10 seconds of water is freezing cold? Does the area in between the sheetrock really get that cold when the house is 70 degrees?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617289
12/28/17 10:45 PM
12/28/17 10:45 PM
Joined: May 2010
Posts: 9,621
out there
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,621
out there
If your pipes are deep enough, i think most ground temps are 52F.


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Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617292
12/28/17 10:47 PM
12/28/17 10:47 PM
Joined: Jun 2005
Posts: 11,729
Santa Barbara, CA
bdcardinal Online content
bdcardinal  Online Content
Joined: Jun 2005
Posts: 11,729
Santa Barbara, CA
Cal me crazy and wasteful but I don't get in the shower until the water is hot.


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Opinions expressed are my own.
Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617298
12/28/17 10:54 PM
12/28/17 10:54 PM
Joined: Dec 2016
Posts: 7,428
Waco, TX
Linctex Online content
Linctex  Online Content
Joined: Dec 2016
Posts: 7,428
Waco, TX
Originally Posted By: motor_oil_madman
You know when it's cold outside and you take a shower and the first 10 seconds of water is freezing cold? Does the area in between the sheetrock really get that cold when the house is 70 degrees?


You are in Houston.

Don't be surprised if your house has no insulation. Really.


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Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617299
12/28/17 10:56 PM
12/28/17 10:56 PM
Joined: Mar 2010
Posts: 1,364
Michigan
BobsArmory Offline
BobsArmory  Offline
Joined: Mar 2010
Posts: 1,364
Michigan
Tap water in Michigan is always freezing cold.


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Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617300
12/28/17 10:57 PM
12/28/17 10:57 PM
Joined: Jul 2010
Posts: 19,559
PNW
ZeeOSix Offline
ZeeOSix  Offline
Joined: Jul 2010
Posts: 19,559
PNW
If the house has a crawl space, then water plumbing is in the cold, If not insulated well they will get pretty cold if no hot water is flowing through them for a long time.

Re: How does the water inside pipes get so cold? [Re: bdcardinal] #4617302
12/28/17 11:02 PM
12/28/17 11:02 PM
Joined: Mar 2014
Posts: 3,579
NJ
Leo99 Offline
Leo99  Offline
Joined: Mar 2014
Posts: 3,579
NJ
Originally Posted By: bdcardinal
Cal me crazy and wasteful but I don't get in the shower until the water is hot.



Takes my shower about 3 minutes to warm up. There's a lot of piping from the HWH in basement up to the shower.

I'm crazy like you.


Without data you're just another person with an opinion. W. E. Deming

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Re: How does the water inside pipes get so cold? [Re: spasm3] #4617305
12/28/17 11:05 PM
12/28/17 11:05 PM
Joined: Jun 2003
Posts: 18,011
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 18,011
Deplorable in apple valley, ca
Originally Posted By: spasm3
If your pipes are deep enough, i think most ground temps are 52F.
water comming out of my well is 59f.


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Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617309
12/28/17 11:11 PM
12/28/17 11:11 PM
Joined: May 2017
Posts: 50
Tennessee
OTCW Offline
OTCW  Offline
Joined: May 2017
Posts: 50
Tennessee
If your water comes from a surface source vs a well source, it is pretty cold to stary with when the weather is cold outside.


2017 Nissan Sentra 1.8L 11k miles
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Re: How does the water inside pipes get so cold? [Re: Leo99] #4617326
12/28/17 11:39 PM
12/28/17 11:39 PM
Joined: Mar 2015
Posts: 5,588
Virginia
bbhero Online content
bbhero  Online Content
Joined: Mar 2015
Posts: 5,588
Virginia
I thought you were crazy long before reading this....

Just messing with ya smile


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Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617342
12/29/17 12:00 AM
12/29/17 12:00 AM
Joined: Mar 2017
Posts: 6,945
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 6,945
...
How cold does it get in Houston? Where does your water come from? Important questions to your question.


Cannot see signatures any longer so it doesn’t matter.
Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617348
12/29/17 12:13 AM
12/29/17 12:13 AM
Joined: Dec 2002
Posts: 41,922
'Stralia
Shannow Online content
Shannow  Online Content
Joined: Dec 2002
Posts: 41,922
'Stralia
My old house was two sheets of sheetrock, and about 3" of airgap...the water could be freezing cold (or frozen) or scalding depending on what was going on.

Funny, only woke up this morning recollecting a thermodynamics assignment where we had to work out heat transfer difference between lagged and unlagged pipes...1/4" (yes not your size), and typically lagging actually increases heat transfer with run of the mill pipe insulation.

Re: How does the water inside pipes get so cold? [Re: bdcardinal] #4617468
12/29/17 07:40 AM
12/29/17 07:40 AM
Joined: Jun 2002
Posts: 1,991
Texas
Bud Offline
Bud  Offline
Joined: Jun 2002
Posts: 1,991
Texas
Originally Posted By: bdcardinal
Cal me crazy and wasteful but I don't get in the shower until the water is hot.


Wasteful or not, your way is the only way to go.


2016 Honda Pilot EX-L with NAVI.....Mobil 1 0w20 AFE and Honda OEM Filter
Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617469
12/29/17 07:43 AM
12/29/17 07:43 AM
Joined: Nov 2009
Posts: 5,171
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 5,171
Houston, Texas
I'm just talking about the pipes in between the water heater and shower. So 18ft or So?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: How does the water inside pipes get so cold? [Re: motor_oil_madman] #4617473
12/29/17 07:49 AM
12/29/17 07:49 AM
Joined: Dec 2012
Posts: 1,949
WNY
redhat Offline
redhat  Offline
Joined: Dec 2012
Posts: 1,949
WNY
Well that water that isn't moving will at some point get down to ambient temperature. Since most of us run around 98.6 degrees F, 70 would seem pretty cold.


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