Kyle, those lengths are to be used for 13D calculations. They're allowed omissions per NFPA 13 2016 23.4.4.8.1 (3).
Taylor Schumacher, ET From: Kyle.Montgomery <[email protected]> Sent: Monday, December 12, 2022 9:29 AM To: [email protected] Subject: [Sprinklerforum] Hydraulic Calculations for CPVC - Tees - Straight-through Flow NFPA 13 clearly states that "fitting loss for straight-through flow in a tee or cross shall not be included". But some of the manufacturer's data for CPVC products specifically lists equivalent lengths for these fittings (tee on the run) as well as for couplings. So, are those equivalent lengths intended/required to be included in the hydraulic calculations? If so, is it all the time or only in certain situations? Someone suggested to me that if might be a requirement of 13D or 13R, but not 13. I haven't found that yet, though. Thanks. -Kyle M
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