May want to check you local plumbing code. There is specific criteria for storm water and wastewater and sprinkler water is many times considered wastewater
John P From: Chris Dorn <chris.d...@dornfireprotection.com> Sent: Wednesday, August 23, 2023 8:17 AM To: Discussion list on issues relating to automatic fire sprinklers <sprinklerforum@lists.firesprinkler.org> Subject: [EXTERNAL] [Sprinklerforum] Re: Roof Drain / Sprinkler Drain Brian, This would be a cross connection of the potable water system with wastewater. At minimum you would need a 1" air gap. Chris Dorn From: Brian Harris <bhar...@bvssystemsinc.com<mailto:bhar...@bvssystemsinc.com>> Sent: Wednesday, August 23, 2023 8:53 AM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Subject: [Sprinklerforum] Roof Drain / Sprinkler Drain We have a project with standpipes and a basement. All floors above the basement drain through the Standpipe drain and empty at grade. We usually then drain the remaining (basement) section of standpipe through the bottom hose valve. The GC is asking if we can instead drain that last section by tying into the roof drain in the same stairwell that runs outside below grade. Is this a no-no? Brian Harris, CET BVS Systems Inc. bvssystemsinc.com<https://urldefense.com/v3/__http:/bvssystemsinc.com/__;!!JNMHBvMFenyP!7gfIZ1Ez_yyibmv-tcysb82x6oxnfnjyUgKFtB0fE2WAzuh_Q9MOY7zYavhvlxuMskiUFZhqg_myD8twCjxJ6TVR9j1c4AhSHro$> Phone: 704.896.9989 Fax: 704.896.1935 ________________________________ Both the individual sending this e-mail and The Lubrizol Corporation intend that this electronic message be used exclusively by the individual or entity to which it is intended to be addressed. This message may contain information that is privileged, confidential and thereby exempt and protected from unauthorized disclosure under applicable law. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, be aware that any disclosure, dissemination, distribution or copying of this communication, or the use of its contents, is not authorized and is strictly prohibited. If you have received this communication and are not the intended recipient, please notify the sender immediately and permanently delete the original message from your e-mail system. http://online.lubrizol.com/email/disclaimer/cliquez_ici_pour_traduction_en_francais.htm http://online.lubrizol.com/email/disclaimer/Klicken_Sie_hier_fur_die_deutsche_Ubersetzung.htm http://online.lubrizol.com/email/disclaimer/Clicar_aqui_para_versao_em_Portugues.htm http://online.lubrizol.com/email/disclaimer/De_un_clic_aqui_para_su_traduccion_al_espanol.htm http://online.lubrizol.com/email/disclaimer/Chinese.htm http://online.lubrizol.com/email/disclaimer/Japanese.htm
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