I have the 1985 book, and it wasn't allowed then. Same rule as now, ½ x 1 ell to 1" drops.
-----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Jennifer Cornett via Sprinklerforum Sent: Thursday, July 1, 2021 10:45 AM To: Mark Phillips <[email protected]>; [email protected] Cc: Jennifer Cornett <[email protected]> Subject: RE: Sprinkler drop sizing The branchlines are 1", 1-1/4", etc. with a tee and the drop is ½" pipe to the sprinkler heads. Where I would normally design a 1" drop, they used ½". Sincerely, Jennifer Cornett, NICET SET Sprinkler Sales Firetrol Protection Systems, Inc. 1001 Ave. B Lubbock, Texas 79401 Ph 806-771-3500 Cell 806-589-9630 Fax 806-771-3501 https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.firetrol.net%2F&data=04%7C01%7Cdwilson%40blackhawksprinklers.com%7Cae4b0f62c0dc4e334df408d93ca758d7%7C20b3eafa18334148b9c58e75b45c105a%7C1%7C1%7C637607511722507659%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=kc%2BlRxn2CSGtMULXo%2FBrodet%2FABlV%2FNbAju5aOPx%2BXM%3D&reserved=0<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.firetrol.net%2F&data=04%7C01%7Cdwilson%40blackhawksprinklers.com%7Cae4b0f62c0dc4e334df408d93ca758d7%7C20b3eafa18334148b9c58e75b45c105a%7C1%7C1%7C637607511722507659%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=kc%2BlRxn2CSGtMULXo%2FBrodet%2FABlV%2FNbAju5aOPx%2BXM%3D&reserved=0> ____________________________________________________________ This email is intended for the use of the individual or entity to which it is addressed and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If the reader of this email message is not the intended recipient, or the employee or agent responsible for delivery of the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is prohibited. If you have received this email in error, please notify us immediately by telephone at 806-771-3500 and also indicate the sender's name. Thank you. From: Mark Phillips <[email protected]> Sent: Thursday, July 1, 2021 10:39 AM To: [email protected] Cc: Jennifer Cornett <[email protected]> Subject: Re: Sprinkler drop sizing Code allows you to retrofit that with a 1/2 x1 ell and a 1 " new drop if the outlets are 1/2" off line Could you elaborate? Sent from my mobile device Please excuse spelling, grammar, and auto correction. Mark Phillips Branch Manager Fire Sprinkler Design, Install, Inspections Service, Backflows, Fire Alarm Inspections 832-101 Purser Drive Raleigh NC 27603 Phone: 919-779-4010 Fax : 919-779-4014 Cell : 919-268-7587 Email : [email protected]<mailto:[email protected]> Web : https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pyebarkerfire.com%2F&data=04%7C01%7Cdwilson%40blackhawksprinklers.com%7Cae4b0f62c0dc4e334df408d93ca758d7%7C20b3eafa18334148b9c58e75b45c105a%7C1%7C1%7C637607511722507659%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=8lKepdH2UXH1xGNslAiLJyOv33zmVHpC70aCH3WAsFM%3D&reserved=0<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.com%2Fv3%2F__http%3A%2Fwww.pyebarkerfire.com__%3B!!O7jEn5k3aH8!PWO-uF8HOdKHxZKLsnVXpMFeJLvah-4u_dvJ_LdBhmLV23FhjFlJTFaWWiMVZtspRQ%24&data=04%7C01%7Cdwilson%40blackhawksprinklers.com%7Cae4b0f62c0dc4e334df408d93ca758d7%7C20b3eafa18334148b9c58e75b45c105a%7C1%7C1%7C637607511722517614%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=YKJbr7p7a%2FsoZ4THT3ICIuBjpkQav%2BGoLGwBHn8tLXE%3D&reserved=0> ________________________________ From: Sprinklerforum <[email protected]<mailto:[email protected]>> on behalf of Jennifer Cornett via Sprinklerforum <[email protected]<mailto:[email protected]>> Sent: Thursday, July 1, 2021 11:31:25 AM To: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Cc: Jennifer Cornett <[email protected]<mailto:[email protected]>> Subject: Sprinkler drop sizing [EXTERNAL] I have a customer with an existing system that the fire marshal wants brought up to code. Some is simply adding/relocating heads, but some is that the original installation company used 1/2" drops for the sprinkler heads. The fire marshal wants all of them changed. The customer wants to know where in code it says that 1/2" drops are not acceptable and why using a 1x1/2 reducer is. Thank you! Sincerely, Jennifer Cornett, NICET SET Sprinkler Sales Firetrol Protection Systems, Inc. 1001 Ave. B Lubbock, Texas 79401 Ph 806-771-3500 Cell 806-589-9630 Fax 806-771-3501 https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.firetrol.net%2F&data=04%7C01%7Cdwilson%40blackhawksprinklers.com%7Cae4b0f62c0dc4e334df408d93ca758d7%7C20b3eafa18334148b9c58e75b45c105a%7C1%7C1%7C637607511722517614%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=EsBFtRTHPrYpXBikh37E8h%2F%2FfpFkMh7FlsfEC7SUhtE%3D&reserved=0<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.firetrol.net%2F&data=04%7C01%7Cdwilson%40blackhawksprinklers.com%7Cae4b0f62c0dc4e334df408d93ca758d7%7C20b3eafa18334148b9c58e75b45c105a%7C1%7C1%7C637607511722517614%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=EsBFtRTHPrYpXBikh37E8h%2F%2FfpFkMh7FlsfEC7SUhtE%3D&reserved=0> ____________________________________________________________ This email is intended for the use of the individual or entity to which it is addressed and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If the reader of this email message is not the intended recipient, or the employee or agent responsible for delivery of the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is prohibited. If you have received this email in error, please notify us immediately by telephone at 806-771-3500 and also indicate the sender's name. 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