I'm hoping someone might be able to provide a little direction on the requirements of NFPA 13 2016 Section 22.214.171.124.1 (4) for hydraulic calculations.
We typically use 2"x2"x2 1/2" Vic IR Bullhead Tee directly on the welded grooved outlet. Per NFPA we should be including these fittings on the branch line, but we have always included the tee fitting on the 2 1/2" riser nipple because inside diameters are not typical to a 2" tee.
We have been doing this for the longest time and recently received corrections from the local AHJ. Victaulic does not specify the frictional resistance - equivalent length of the NO. 104 Bullhead Tee fitting on the branch line.
Have you come across this before, or any suggestions?
I tried to create a new fitting type in HydraCalc, but was having trouble. Also, might be pointless since there is no data for this on Victaulic's cut sheets. Thanks in advance.
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