Viking mentions that couplings allow water to pool and freeze over the seal. Also I don't know that there's as much of a "standard" for coupling dimensions as there are for fittings, the normal ones we use would probably have the clearance, but they make shorter ones and other designs that would probably put the pipe too close to the sprinkler.
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 / fax 260.487.7991 email [email protected]<mailto:[email protected]> [cid:[email protected]] ________________________________ From: Brian Harris <[email protected]> Sent: Wednesday, July 31, 2024 9:04:43 AM To: [email protected] <[email protected]> Subject: [Sprinklerforum] Dry Heads in Couplings I've seen dry heads installed in threaded couplings attached to 1" pipe, then ran back to a branchline. Just happened to notice on one of Victaulic's installation brochures they prohibit dry heads from being attached to elbows ZjQcmQRYFpfptBannerStart This Message Is From an Untrusted Sender You have not previously corresponded with this sender. ZjQcmQRYFpfptBannerEnd I've seen dry heads installed in threaded couplings attached to 1" pipe, then ran back to a branchline. Just happened to notice on one of Victaulic's installation brochures they prohibit dry heads from being attached to elbows & threaded couplings. The elbow part was well known, not so much the coupling part. Curious why you can thread into a 1" tee but not a 1" coupling? Thank you, Brian Harris, CET BVS Systems Inc. bvssystemsinc.com<https://urldefense.com/v3/__http:/bvssystemsinc.com/__;!!FaxH778!fviAlyt2fXz0utUcsrQ3Gng-QBwzoKlByhs5PU-QxSetAQ0iuepiEp5XZ_CL515ztKupI9sm90qciAlTwmHWdw$> Phone: 704.896.9989 Fax: 704.896.1935 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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