Like the Mech Tee problem I sited last week, in this case the additional friction losses must be taken into account so you could need another 30psi or more at the head.
Regards, Russell Gregory Christchurch, New Zealand. From: Sprinklerforum [mailto:[email protected]] On Behalf Of Matt Grise Sent: Thursday, 10 November 2016 11:23 AM To: [email protected] Subject: RE: ESFR retrofit I agree that there would be a lot of friction there. The fitting would be ¾” weld-o-let to 3/4” brass nipple (male-male) to 3/4 by 1 reducer (female-female) to sprinkler head. But any code prohibitions? 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 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Art Tiroly Sent: Wednesday, November 09, 2016 3:44 PM To: [email protected] Subject: RE: ESFR retrofit Measure the ID of the brass nipple. The ID is near 1”. Can you get a 1x3/4 male reducer. Think about velocity and turbulence at ~ 125 gpm Art Art Tiroly ATCO Fire Protection/Tiroly 24400 Highland Rd CLE 44143 216-621-8899 216-570-7030 cell From: Sprinklerforum [mailto:[email protected]] On Behalf Of Matt Grise Sent: Wednesday, November 09, 2016 4:15 PM To: [email protected] Subject: ESFR retrofit 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 _____ <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> Image removed by sender. Avast logo This email has been checked for viruses by Avast antivirus software. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
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