Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
If our community has helped you, please consider making a contribution to support this website. Thanks!

Magical mystery fitting

SVDW
SVDW Member Posts: 80
in Domestic Hot Water
This is installed on 2” DHW  line in a school built in the 50’s. No rating plate or rivet holes where there ever was one. Anyone have any idea what it might be? My guess so far is a thermosiphon recirc device or an exp compensator. Smartest piping guys in the world are on this forum.  Any of you seen this before? Thank you for your time! 

Comments

  • JUGHNE
    JUGHNE Member Posts: 11,498
    edited July 2022
    Strainer/filter???

    It would have most likely been plugged by now.

    Maybe the guts are out of it.
    Zman
  • PC7060
    PC7060 Member Posts: 1,747
    check valve?
    JUGHNEdelta Tmattmia2
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,969
    edited July 2022
    Hi, it could be something unusual like magnetic water treatment… I think the only way to know for sure is to take the unions off, unbolt it and see what’s inside.

    Yours, Larry
  • Big Ed_4
    Big Ed_4 Member Posts: 3,295
    Check Valve upstream from the fire hydrant system ?

    There was an error rendering this rich post.

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 18,767
    Looks like maybe a packing joint on the left side. I would think it is an expansion device
  • PC7060
    PC7060 Member Posts: 1,747
    Open it! Open it!  :D
    mattmia2kcopp
  • rick in Alaska
    rick in Alaska Member Posts: 1,504
    I'm wondering if it is a flow restrictor? Is the packing gland on the side because it is set up like a dresser coupling for the copper pipe?
    Rick

Categories