Parallel Water Heaters - Want to Install Recirc Pump

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by zman98, Dec 8, 2005.

  1. zman98

    zman98 New Member

    Messages:
    2
    Hi All,

    I'm new here. Hope you folks can help.

    I have finally tired of my wife complaining about waiting for hot water at the shower. I am looking at the Grundfos Recirc pump. I have a question:

    Since I have two water heaters running parallel will I need to install two pumps or just one pump where the two hot water out lines connect? I'm thinking one will work but I thought I would ask.

    Thanks!
  2. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    First, in order for the circulating pump to work you need a return line so the water can circulate. Do you have a basement and is it finished.
  3. pump install

    if you have two water heaters in parrell,
    you are going to have to install the return line
    into the cold inlet to the water heaters BEFORE it
    divides off to both units, and you will have to install
    a spring loaded check valve before this connection
    to keep the water from going back up the cold line..


    ps......you are opening a huge can of worms here because

    all you are realy doing is spoiling your wife, once she realizes
    that you are willing to go through all this trouble to please her
    it will never end...
    Last edited: Dec 9, 2005
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,534
    Location:
    Cave Creek, Arizona
    pump

    One pump in the common outlet pipe will do find. But you will need a "Comfort" control valve at each "far end" of the piping system.
  5. jimmym

    jimmym New Member

    Messages:
    69
    Location:
    New York
    A wise man.
    Your name should be "master AND plumber mark".

    zma98,
    All you're doing is reinforcing the idea that her nagging gets her what she wants. Like giving in to those screaming kids in the grocery checkout line. If the dog takes a leak on the carpet, do you give it a bone?
    You can lead a horse to water, but cannot make it drink.
    But if it does, it'll expect you to lead it everywhere anytime it wants anything!
    Now, that said, do you want a project? If so, go ahead. Plumbing and building stuff is fun.
    Like my buddy Sean said to his daughter when she asked why we were working on our project in the garage. "Honey, a project is something Daddies do when they want to get away from the Mommies."
  6. thats a good saying

    that is a very wise saying that you posted
    I will remember it


    You can lead a horse to water, but cannot make it drink.
    But if it does, it'll expect you to lead it everywhere anytime it wants anything!

    --------------------------------------------------------------------------


    another good saying...


    Never give a sucker an even break......

    because if you do, he will never learn aything from the experience

    of being someones chump..,

    and will just keep repeating the same mistake over and over agian.
  7. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    Mark, I like it, you can boil it down to this:

    One thing man never learns from history is,

    that man never learns from history.
  8. jimmym

    jimmym New Member

    Messages:
    69
    Location:
    New York
    Sorry about the smart a** comments.
    I thought that you should put the water heaters in parallel. That way you are assured that one is not doing most of the work because of uneven flow.
  9. zman98

    zman98 New Member

    Messages:
    2
    Thanks guys. Love the humor.
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