Pressure Balance
Pressure Balance
(OP)
NFPA 13 - 22.4.2.4 states that "Pressures at hydraulic junction points shall balance within 0.5 psi (0.03 bar)" . I was not able to clarify what it refers to. On an elbow or on a tee how am i going to do that ?





RE: Pressure Balance
Otherwise you can always fall back on the "Hardy Cross Method" which is very cumbersome and a pain in the neck.
RE: Pressure Balance
But in that case, how can 0.5 psi difference be possible , if i have five sprinkler on one branch line and only one on the other branchline ?
RE: Pressure Balance
But in that case, how can 0.5 psi difference be possible , if i have five sprinkler on one branch line and only one on the other branchline ?"
Balancing only applies to gridded systems.