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  1. R

    2 inputs (cold), 1 output into a single water heater

    thanks to both of you for your help. I learned a lot about a topic and was kind of fun, except that the minor issue described. Appreciate it
  2. R

    2 inputs (cold), 1 output into a single water heater

    Fair question... I doubt those needs really exist, but that is how the house was designed and I do not want to re-architect the entire house. In reality when the secondary water heater breaks, I will probably just bypass it.
  3. R

    2 inputs (cold), 1 output into a single water heater

    Agreed Frodo... it is most likely part of the circulation system. Question is can I do the following to reintegrate it with the new water heater (since I am not aware of the new hot water heater having a 2nd cold water intake, but if it does my problem is solved) Take the existing FROM -->...
  4. R

    2 inputs (cold), 1 output into a single water heater

    1- Model M2XR504T5FBN7 2- one you can see the rust stain coming from the other "space heater port" about 4 feet above the port in question, the other and original reason for replacing the heater was the pressure relief valve connection (replacing the valve did not remove the leak, very rusted...
  5. R

    2 inputs (cold), 1 output into a single water heater

    This is absolutely the input port being used, and I do not have a heat exchange (that I am aware of). Heated floors are a possibility, but doubtful.
  6. R

    2 inputs (cold), 1 output into a single water heater

    Thanks all for the quick replies, extremely quick replies. - I have lived in the house for 2 years and there have been 5+ owners over the last 20. Many remodels so it could litterally be anything. - Previous owners know nothing - There is a copper pipe connected to the pump at the bottom that...
  7. R

    2 inputs (cold), 1 output into a single water heater

    Another guess is I have an expansion tank someplace in this house and the pump is taking that water and "reheating" it to increase the capacity of the 2 water heaters. No idea what it would look like or where it would be located.
  8. R

    2 inputs (cold), 1 output into a single water heater

    Hello All, First time I have posted but I have scowered the internet the last few days. I have 2 (50G) water heaters installed in parallel for a total of 100G and the "master" failed on me. It has started to leak from 2 spots and needs to be replaced. So I did what anyone should do, call a...
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