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  1. #1
    Join Date
    Apr 2008
    Location
    McKinney Texas
    Posts
    475

    Default New one...what is this ?

    This small metal connection was tied into the cold water side of one of two side-by-side new water heaters in a new construction home in Prosper Texas. The device was between the cold-water inlet and the shut-off valve. The device routed water to the pan drain line See photos. (It was tied into, and downstream of, the pan drain line. It almost appeared like it was supposed to be some sort of back pressure release. The static water pressure was 115 lbs and no expansion tanks were installed, but that is another story. Oh Ye of greater knowledge.....What is this device and/or connection and what is it's purpose?

    Gene

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  2. #2
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,481

    Default Re: New one...what is this ?

    Got me... Maybe some kind of trap primer?

    Department of Redundancy Department
    http://www.FullCircleInspect.com/

  3. #3
    Join Date
    Mar 2007
    Location
    Plano, Texas
    Posts
    4,170

    Default Re: New one...what is this ?

    Watts: BRV | Combination Ball Valve and Relief Valves

    Looks like one of these. Takes the place of a thermal expansion tank.

    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  4. #4
    Join Date
    Apr 2008
    Location
    McKinney Texas
    Posts
    475

    Default Re: New one...what is this ?

    Hi Jim, you are right, that is it. Good job.

    Thanks

    Gene


  5. #5
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,847

    Default Re: New one...what is this ?

    Yep, it is an expansion valve. See them all of the time in place of an expansion tank. Great little device that works well.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  6. #6
    David Bell's Avatar
    David Bell Guest

    Default Re: New one...what is this ?

    They do work well on water heaters but don't address the pressure problems in the whole house. A pressure reducing valve should be installed at the meter. High water pressure reduces the lifespan of fixtures and devices such as auto-feed valves.


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