(206) 949-5683, Top Rated Plumber, Seattle
Page 2 of 3 FirstFirst 123 LastLast
Results 16 to 30 of 31

Thread: Water heater temperature

  1. #16
    DIY Junior Member jhp1981's Avatar
    Join Date
    Jan 2014
    Location
    Texas
    Posts
    21

    Default

    I was told dip tubes could melt during soldering.

  2. #17
    DIY Junior Member jhp1981's Avatar
    Join Date
    Jan 2014
    Location
    Texas
    Posts
    21

    Default

    Used a cup of crushed ice. Waited for it to melt a bit and set thermometer to 32 F. Thermometer is pretty close to HVAC thermostat.

  3. #18
    DIY Senior Member Reach4's Avatar
    Join Date
    Sep 2013
    Location
    IL
    Posts
    1,258

    Default

    Quote Originally Posted by jhp1981 View Post
    I was told dip tubes could melt during soldering.
    I don't know about that, but if that happened, your hot water at the sink would only stay hot for a limited time before the cold water coming into the heater flowed to the hot water output. Your hot water stays hot many minutes once hot, so you are not having a dip tube problem.

  4. #19
    DIY Senior Member Reach4's Avatar
    Join Date
    Sep 2013
    Location
    IL
    Posts
    1,258

    Default

    Quote Originally Posted by jhp1981 View Post
    Used a cup of crushed ice. Waited for it to melt a bit and set thermometer to 32 F. Thermometer is pretty close to HVAC thermostat.
    Is that an electronic thermometer with a probe? If so, try taping the probe to your hot water pipe coming out of the heater. Wrap insulating material around the pipe and probe combo. Use that to measure the water temperature during extended flows.

  5. #20
    DIY Junior Member jhp1981's Avatar
    Join Date
    Jan 2014
    Location
    Texas
    Posts
    21

    Default

    No. Its just an ordinary cooking thermometer.

  6. #21
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    Quote Originally Posted by jhp1981 View Post
    No. Its just an ordinary cooking thermometer.

    I never cooked at 32F before.

    You do know that Ice can be colder than 32F right ?

    Have Fun.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  7. #22
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    Quote Originally Posted by jhp1981 View Post
    I was told dip tubes could melt during soldering.
    It maybe could.

    Can you take a picture of it (Top, and T-stats) and give us the model number.

    If the dip tube is missing it will be mixing hot with cold water.

    Was it full of water before Power was applied ?
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  8. #23
    In the trades Dana's Avatar
    Join Date
    Jan 2009
    Location
    01609
    Posts
    2,720

    Default

    If the pipe is installed in or under the slab, the odds are pretty good the temperature drop is simply due to the heat loss to the slab or soil. Neither concrete, soil, nor copper is very insulating, and running 120F water at 1-2gpm through half-inch pipe in a concrete slab is pretty much how radiant floor heating works. If any of that slab extends out beyond the wall insulation, it's going to be a bigger issue in mid-winter than during the summer

    Running the potable plumbing under the slab a common (but pretty crummy) way to route plumbing in slab on grade, bad for hot water heating/distirbution efficiency, and impossible to repair. But if that's what you've got, it's probably not cost effective to do anything more than bump the storage temp up. In some areas builders are required to insulate any buried hot water distribution plumbing to avoid this problem, and the efficiency hit associated with it. But even there it can still happen if the inspectors didn't see it before the slab was poured, or if it wasn't clear after the pour which was intended to be the cold side plumbing and which was the hot.

  9. #24
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    Good theory Dana.

    If it was slab cooling, you would think it would have been a lot colder in the bathroom. (I assumed, Farthest Faucet, I Know...)

    They run the pipes in the attic here, and attic temp make a Big difference on a cold day.

    Not sure what part of Texas the OP is in. Never would have thought they would be in the slab.


    Have Fun.
    Last edited by DonL; 02-14-2014 at 03:05 PM.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  10. #25
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,655

    Default

    quote; May I ask the calibration procedure ?

    Normally to put it in boiling water and then rotate the needle to 212 degrees.
    Licensed residential and commercial plumber

  11. #26
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    Quote Originally Posted by hj View Post
    quote; May I ask the calibration procedure ?

    Normally to put it in boiling water and then rotate the needle to 212 degrees.

    That is what I would do, after it was removed from the heat.

    At sea level it will be very close.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  12. #27
    DIY Senior Member Reach4's Avatar
    Join Date
    Sep 2013
    Location
    IL
    Posts
    1,258

    Default

    Quote Originally Posted by hj View Post
    quote; May I ask the calibration procedure ?

    Normally to put it in boiling water and then rotate the needle to 212 degrees.
    You might want to switch to about 208.5 degrees at 2129 feet above MSL.

    http://wiki.answers.com/Q/How_does_t...point_of_water

  13. #28
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    Quote Originally Posted by Reach4 View Post
    You might want to switch to about 208.5 degrees at 2129 feet above MSL.

    http://wiki.answers.com/Q/How_does_t...point_of_water

    Cant you just boil it longer ?

    LOL, Yes it was a joke.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  14. #29
    DIY Senior Member bluebinky's Avatar
    Join Date
    Aug 2011
    Location
    Santa Clara, CA
    Posts
    355

    Default

    Did you actually measure the water temperature inside the water heater? It doesn't matter what the thermostat says...

  15. #30
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,412

    Default

    Quote Originally Posted by DonL View Post
    Cant you just boil it longer ?

    LOL, Yes it was a joke.
    Boiling water never gets hotter than the boiling point over time, only with changes to the pressure (this has nothing to do with the temp of the steam if it can get extra heat). So, it depends entirely on the purity of the water and the air pressure above the open container...close that container and yes, the boiling point can be raised.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

Similar Threads

  1. Water Heater Temperature Question
    By Deltaman in forum Water Heater Forum, Tanks
    Replies: 2
    Last Post: 03-21-2010, 08:44 PM
  2. Gas Hot Water Heater-Temperature control
    By jkcsanchez in forum Water Heater Forum, Tanks
    Replies: 7
    Last Post: 08-22-2009, 11:30 AM
  3. Water Heater temperature
    By kayre in forum Water Heater Forum, Tanks
    Replies: 5
    Last Post: 04-10-2009, 03:47 PM
  4. Water Heater - temperature erratic
    By Lynne Marie in forum HVAC Heating & Cooling
    Replies: 3
    Last Post: 04-11-2008, 05:37 AM
  5. Water Heater - temperature erratic
    By Lynne Marie in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 3
    Last Post: 04-09-2008, 11:45 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •