Can anyone tell me why this section is missing from the 2019 of NFPA 13? 25.2.1.4 Modifications to existing piping systems shall require testing at system working pressure. 25.2.1.4.1 Where modification is made to an existing system affecting more than 20 sprinklers, the new portion shall be isolated and tested at not less than 200 psi (13.8 bar) for 2 hours. 25.2.1.4.2 Modifications that cannot be isolated, such as relocated drops, shall require testing at system working pressure.
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