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Discussion in 'Irrigation' started by muddywater, Sep 16, 2011.
Code is 5 fps.....Yeah well ef that!!! My code says it's 50 FPS!!!
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.
Why is the elbow not a good idea? It seems if anything that would produce lower numbers? possibly more velocity?
Why not check the accuracy against the water meter?
Amazing you can operate @120 psi dynamic... what do you use to glue your fittings?
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.
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.