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Indirect plumbing question

skalor Member Posts: 13
edited November 2017 in THE MAIN WALL
Looking to replace my direct water heater with an indirect soon. I have my 140k propane boiler plumbed in parallel with a 60k pellet boiler to a 120 gallon buffer tank. I was wondering if there were any problems plumbing an indirect out of the other side of the propane boiler. I would retain the drain and relief valve as close to the boiler as possible and set the controls to prioritize the indirect. Any problems with using both sides of the boiler? The only issue I could see is possible flow through either but I can add a flow check to stop that.


  • Ironman
    Ironman Member Posts: 7,400
    I don't see any problem with that, but I'd really like to see all of your near boiler piping to confirm it. Is the boiler pressurized?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • skalor
    skalor Member Posts: 13
    edited November 2017
    1 1/4" between the propane boiler and the buffer tank. The unfinished 1" lines are for the pellet boiler I'm hoping to finish in the next week or so. Boiler is pressurized, hits about 22 psi. This was all done by me last year so it may not be up to par with someone in the trade.