Anyone use a Watts 80 ballcock thermal expansion valve?

Discussion in 'Toilet Forum discussions' started by imac567, Dec 1, 2012.

  1. imac567

    imac567 New Member

    Messages:
    6
    Location:
    Southeast NC
    As an alternative to an expansion tank the Watts 80 is recommended for pressure relief when connected to a closed system (county or city water). Anyone use one? Do they work and how reliable are they? Thank you.
  2. zl700

    zl700 DIY Senior Member

    Messages:
    237
    Location:
    Texas
    They waste water and fail, wasting even more water.
    Best choice to control thermal expansion is a potable water expansion tank pre charged properly at the water heater inlet.
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,319
    Location:
    New England
    FWIW, a properly operating expansion tank does not waste water, a pressure relief valve will. An ET helps to maintain a more even pressure, an relief valve only puts a top limit on it, not hold it to a more proper level. A relief valve may be a good backup, but they can fail as can an ET, then you have nothing to prevent overpressure and potential leaks. Personally, I would not use one as my primary closed system solution.
  4. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,396
    Location:
    Yakima WA
    There a very old, shop worn saying, "If is ain't broke, don't fix it". I think that applies very well to this question. A thermal expansion tank works very well, does not waste water, is easily replaces when it fails, and is inexpensive. Why go look for an alternative?
  5. imac567

    imac567 New Member

    Messages:
    6
    Location:
    Southeast NC
    I see your points, all of them... I'm looking at an Amtrol ST-5 2 gallon, looks good because I really wanted a lined tank, for corrosion reasons. If anyone knows of a better one, Please let me know. Thank you.:) By the way is there a certain distance it has to be installed from the hot water heater? I'd like it to be in my outside pump room just after the pressure regulator.
  6. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,319
    Location:
    New England
    It can be installed anywhere on the cold supply side after the PRV. But, there should be no shutoff valve between the WH and the new expansion tank. This is to ensure it can do its thing when the WH starts to run. They don't last forever, but do last a number of years. Adjust the precharge to your static water pressure before installation.
  7. imac567

    imac567 New Member

    Messages:
    6
    Location:
    Southeast NC
    PRV? Pressure Regulating Valve?
  8. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,319
    Location:
    New England
    Pressure reduction valve or whatever is causing your system to be a closed system (could be a check valve).
    There should be no valve between the ET and the WH.
Similar Threads: Anyone Watts
Forum Title Date
Toilet Forum discussions Drake or Drake II (has anyone successfully removed hard water stains from Sanagloss?) Mar 10, 2014
Toilet Forum discussions Can anyone recommend a toilet that has a true 14 inch rough in? Oct 3, 2013
Toilet Forum discussions I love the look of this AS Madera, but need gravity flush. Anyone know a similar look Apr 16, 2013
Toilet Forum discussions Wall hung toilets - does anyone actually know how to plumb them? Feb 23, 2013
Toilet Forum discussions Has anyone seen this relativity new Mansfield rimless toilet? Nov 18, 2012

Share This Page