I am looking at a warehouse space that needs to upgrade from K14 ESFR to K22. Typically this would involve plugging the ¾” outlets and cutting in new 1” mechanical T’s.
I had someone ask why we could not use a ¾” brass nipple and a ¾” to 1” reducer to up-size the outlet to hold a 1” head. I feel like this is not allowed, but I could not find specifically where. It would not really be an extension fitting. ¾” brass is allowed. Each change of size is done with a single piece reducer. The ¾” tee and nipple would be included in the calculations… Any help on where the code addresses this setup? Thanks! Matt Grisé PE*, LEED AP, NICET II Vice President – New Construction Alliance Fire Protection 130 w 9th Ave. North Kansas City, MO 64116 *Licensed in KS & MO 913.888.0647 ph 913.888.0618 f 913.526.7443 cell www. AFPsprink.com
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