series/parallel connection

  1. O

    Water line replacement/upgrade to pex. Best way to hookup two different size hot water heaters

    So this is in wisconsin and it is a duplex setup not currently rented and whole house is still used. So plumbing was done back probably in 70s and imo ran very inefficient and improperly. Am replacing all the waterlines to pex and are currently copper/steel. So ill layout my current plan and...
    • Oconnellshawn88
    • Thread
    • expansion tank hot water recirculating system multi-unit pex a plumbing advice series/parallel connection water heater water supply main
    • Replies: 3
    • Forum: Water Heater Forum, Tanks
  2. Dave Armstrong

    Hot Water from Cold Tap

    About a year ago I had two old 50 gallon water heaters with new ones. The installer did two changes to the previous system. 1) He installed an expansion tank, and 2) he put the two water heaters in series (the previous ones were in parallel). Ever since then we have experienced hot water...
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