Tying tankless to tank version

Discussion in 'Water Heaters and Softeners' started by Hamberg, Jan 12, 2019.

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  1. Jan 12, 2019 #1

    Hamberg

    Hamberg

    Hamberg

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    (short lead in... had an addition build a couple years back and a Rheem ECO200 9.5 GPM tankless unit installed - addition is 1 bth, kitchen and laundry - with the anticipation of tying it into the main section at some point)

    Question: what is the best practice to do so? Would it be best to run the hot side of the tankless directly into the cold side of the tank heater - thus feeding hot water into that unit or tee it into the hot side of the tank heater?

    If you tee it in, does there need to be an isolator or check valve in line?

    Thanks in adavance! -Bill
     
  2. Jan 12, 2019 #2

    frodo

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    Just call me Macgyver Professional Supporting Member

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  3. Jan 12, 2019 #3

    Hamberg

    Hamberg

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    Perfect exactly how I thought it should be!!

    Follow-up question; no return line, can I dispense (plumbing pun) with the check valve(s)
     
    Last edited: Jan 12, 2019
  4. Jan 12, 2019 #4

    frodo

    frodo

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    Tankless-recirculation-system2.jpg
     
    Hamberg likes this.
  5. Jan 12, 2019 #5

    breplum

    breplum

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    Dear frodo,
    What graphic rendering resource are you using to present the drawing?
     
  6. Jan 12, 2019 #6

    Diehard

    Diehard

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    My guess is he found it already made up for recirc systems.
    Which leads me to the question, why are you suggesting a recirc system at all?
     
  7. Jan 21, 2019 #7

    Hamberg

    Hamberg

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    Follow-up question...

    Recommendations for the best (cosmetic) way to terminate the intake/vent for this unit.

    Last unit was old and used stainless witch was pretty close to 6" on center - the new uses PVC and the term kit they included is 5 5/8" OC.

    I'm 3/8" to 1/2" off from making it work. I could "in-theory" chisel out some of the(poured) concrete to make it work - if I had to.




    term.jpg
     

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