Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Size Transfer Pump to Flush a Small Hydronic Loop

Options
Peregrine
Peregrine Member Posts: 28
edited May 25 in THE MAIN WALL

hello All

what size transfer pump to flush and clean a hydronic loop with a 2 gallon fire tube heat exchanger and total length of 280 feet with the largest loop being 100 feet. it is 3/4 inch PEX.

please help and have a great day.

Comments

  • Peregrine
    Peregrine Member Posts: 28

    i am flushing the system. not installing a pump.

    please excuse the miscommunication.

    GGross
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 18,216

    hard to say without doing a lot of calculation but any of the small transfer pumps will probably work.

  • hot_rod
    hot_rod Member Posts: 25,327

    a small 1/2 hr transfer even a small sump pump will flow that

    If it is just an ocassional use get a small plastic sump pump pump.
    If you have a scaling concern get a tankless water heater kit, pump, cleaner, hoses, and bucket, around 80 bucks online

    IMG_0420.jpeg
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    JohnNYGGross
  • Peregrine
    Peregrine Member Posts: 28
    edited May 25

    1/2 horse power 25 gpm pump would be

    V=((.408/d sqrd)*gpm )= 22 fps .

    diameter of 3/4 pex is .681

    22 feet per second is good?

    please help thank you

  • Big Ed_4
    Big Ed_4 Member Posts: 3,238

    I use a small Pony pump ….

    There was an error rendering this rich post.

  • Peregrine
    Peregrine Member Posts: 28

    thank you and have a great day

Categories