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.

Is my water boiler's thermal expansion tank in the correct location?

jjustinia11 Member Posts: 101
edited November 2022 in Gas Heating
I recently redid my old boiler to get me through this last winter. this boiler is providing alt. heat to a hydrocoil on my heat pumps air handlers. I installed a spriovent on the supply side coming right out of the boiler (within 6 inches of first turn) and before the suction of the circs. I also installed manifolds with TACO 007e's and a taco relay. I piped a #60 thermal expansion tank coming out of the bottom of the spirovent. I have a lot going on and it is tight. I was trying to keep the tank away from the relay and electrical so I put it low. I then read that it was supposed to be up higher, but the instructions were not clear. I was hoping the community could look at these pics and tell me if this needs to be changed or if it is good to go. If I need to move it, please let me know generally where I should aim.



Ps. I know the boiler is ancient and I had a small leak on one cheap fitting, and I needed to try and fix it until I can get new pipe and fitting after thanksgiving, everything is closed. eagle eyes will spot the epoxy putty and electrical tape. this will be changed when stores reopen on Friday.


  • hot_rod
    hot_rod Member Posts: 21,872
    It is fine where it is. Do you have adequate support for it?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • jjustinia11
    jjustinia11 Member Posts: 101
    I do and I am adding more. I have a vertical 3/8 rod with copper clamp and a horizontal, you can see in the pic. I also bought a hydroclaw to give it more support if I moved it, but will add it to this location if it stays.