I believe it's at the connection for all types of sprinklers. Tyco I think is the only one that specifies a variable K based on length anymore, I assume the others use a slightly oversized head and adjust the restriction of the tube inside to keep the K constant for all lengths. Reliable has a good section view of theirs where you can see it wicks down inside the tube to the head.
Mike Morey CFPS 3229 * NICET S.E.T. 123677 Project Estimator * Fire Protection Group Shambaugh & Son, LP an EMCOR Company 7614 Opportunity Drive * Fort Wayne, IN * 46825 direct 260.487.7824 / cell 260.417.0625 email [email protected]<mailto:[email protected]> 24/7<outlook-data-detector://2/> SERVICE LINE 888.217.7055<tel:888.217.7055> [cid:[email protected]] From: Travis Mack <[email protected]> Sent: Wednesday, March 26, 2025 12:20 PM To: '[email protected]' <[email protected]> Subject: [Sprinklerforum] Dry Sprinkler K-Factor Is the k-factor for a dry sprinkler to be applied at the sprinkler, or at the point of connection to the piping network? I understand things like the Victaulic Dry Flex sprinkler have the k-factor at the POC. What about all other dry sprinklers? ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message originated outside your organization. ZjQcmQRYFpfptBannerEnd Is the k-factor for a dry sprinkler to be applied at the sprinkler, or at the point of connection to the piping network? I understand things like the Victaulic Dry Flex sprinkler have the k-factor at the POC. What about all other dry sprinklers? POC or sprinkler orifice? Travis Mack, SET M.E.P.CAD | Instructor / Support 181 N. Arroyo Grande Blvd. #105 I Henderson, NV 89074 www.mepcad.com<https://urldefense.com/v3/__http:/www.mepcad.com/__;!!FaxH778!a3vEqPdH6NUzuW69R__rw0WGU9AXwgmxbMNdo8uqF2DCwC0Cw3ONry0rrZwISSwXLwdpd7Sk8ulhdUI$> | 303-923-8215 Email: [email protected]<mailto:[email protected]> AutoSPRINK | AutoSPRINK FAB | AutoSPRINK RVT | AlarmCAD Academy of Fire Sprinkler Technology | Director, Engineering Technology 101 S Main Street, Suite 001, Decatur, IL 62523 This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient.
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