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Discussion in 'Irrigation' started by muddywater, Sep 16, 2011.

  1. mitchgo

    mitchgo LawnSite Silver Member
    Messages: 2,938

    Code is 5 fps.....Yeah well ef that!!! My code says it's 50 FPS!!!
  2. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    That flow meter is only rated to 30 GPM and connecting it on an elbow like that is not a good idea. I have serious doubts on the validity of that data.
  3. muddywater

    muddywater LawnSite Bronze Member
    Messages: 1,813

    Why is the elbow not a good idea? It seems if anything that would produce lower numbers? possibly more velocity?
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,379

    Why not check the accuracy against the water meter?
  5. jvanvliet

    jvanvliet LawnSite Gold Member
    Messages: 3,944

    Amazing you can operate @120 psi dynamic... what do you use to glue your fittings?
  6. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    Turbulence could interfere with the accuracy. Those types of meters are best used where you have fully developed flow (i.e. straight pipe of the same size). The typical minimum recommendation for this is 10 diameters upstream and 5 diameters downstream of any fittings or direction changes.
  7. 1idejim

    1idejim LawnSite Fanatic
    Messages: 11,289

    this is one of the reasons that you'll see cavatation in the hair strainer of an inproperly plumbed swimming pool, limited space for equipment forces some installers to resort to rapid directional changes breaking the 10 and 5 rule.

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