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Discuss Common return off 2 separate systems?? in the Plumbing Forum area at

  1. bobbychocolate

    bobbychocolate New Member

    Hi guys. I am putting in 2 altherma heating system into a house. We need 5 pipes from the plantroom to the house however the plumber has only put in 4 pipes.
    Would it be possible to have a common return off the upstairs and downstairs systems returning to 2 low loss headers in the plantroom. The pipes are already underground so what I'm ask8ng basically, can 2 separate 22mm returns tee into 1 22mm return and still flow back to the low loss headers at the same rate they are being pumped out at??many thanks rob.
  2. sammathias

    sammathias Plumber GSR

    are the 4 pipes flow to zone vale, flow for upstairs, flow for downstairs and return?
  3. sammathias

    sammathias Plumber GSR

    are the heat pumps both going to be working same time or one as a back up?
  4. Hibster

    Hibster New Member

    5 pipes? Please explain your plan!
    If it is meant for 2 zones then could you not move the valves into the house, if not then may need non return valves if combining the two returns.
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