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Pump size

Snowmelt
Snowmelt Member Posts: 1,422
edited November 2020 in THE MAIN WALL
I have 700 feet of linier piping 30 elbows , 4 tees. Starts off with two inch pipe for 120 feet then goes to 1-1/4 and total btu lose of building is 220,000 btu, what size taco pump?

It’s a section of a school

Comments

  • Ironman
    Ironman Member Posts: 7,441
    Just just using some quick rule of thumb, you’d probably have about 40’ of head @ 22 gpm. Your head may be somewhat lower due to the section of 2” pipe involved. Is it iron or copper pipe?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Ironman
    Ironman Member Posts: 7,441
    A Taco 2400-50 may come close.

    If you contact them, they can size it for you.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Snowmelt
    Snowmelt Member Posts: 1,422
    All copper piping
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,556
    edited November 2020
    This is from my "GoTo" book on the subject.


    Look at the section second from the bottom "PUMP HEAD"

    If that is the only pump on the system, that formula works. If it is a zone off of a central boiler that does more than just the section you described, then you add 33% to the total equivalent length for the piping from the boiler to the zone That is on page 13 of this:http://media.blueridgecompany.com/documents/ZoningMadeEasy.pdf
    But you will want to read page 7 first to get the whole picture.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,084
    edited November 2020
    Bet bet is a B & G system sizer you can calculate it yourself. You can get a B& G wheel or go online and download the app.

    If the 700 feet of pipe one way or out and back?

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