That's just one way; and you can drain to sanitary sewer per the plumbing code, but you have to use an approved receptor. Which may include a hub drain, a floor sink or a floor drain. All of these require a trap, which itself is required to be a self-priming trap if it's 3" or larger, which is what we generally specify. You don't need a backflow appliance, but there is an air gap. The only difference between a hub drain and the other two is that it's above grade, which makes it ideally suited to exterior applications. But expense isn't a big issue - these are all off-the-shelf parts in the plumbing world, and if you are prohibited (as we are in much of California now) from discharging to storm, these are simple solutions.
Steve Leyton Protection Design & Consulting San Diego, CA -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of craig.pr...@ch2m.com Sent: Friday, January 09, 2009 7:33 AM To: sprinklerforum@firesprinkler.org Subject: RE: Sprinkler system interconnection to domestic waste pipe You need what is called a hub drain. Then route the I.T. to it, leave the appropriate air gap and you're done. Unfortunately the hub drain also requires other plumbing for keeping the trap primed and the expense of installing one might not be justified for your sprinkler drain. Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 craig.pr...@ch2m.com http://www.ch2m.com -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Russell Sent: Friday, January 09, 2009 9:57 AM To: AFSA Subject: Sprinkler system interconnection to domestic waste pipe I have a situation where the inspector's test discharge cannot be piped to the outside or a floor drain. I do have though, a domestic waste pipe near by. I know that NFPA13 does not allow direct connection of the two and I think I understand the reason for this, but can a check valve be put in the test discharge pipe to satisfy the NFPA requirement? Does anyone know of some sort of air gap device or other method to accomplish this? Never faced this situation before. Any suggestions will be greatly appreciated. Russell Rewis Brown Automatic Sprinklers, Inc. 107C Hemlock Street Valdosta, Georgia 31601 229-244-8130 russ...@brownautomatic.com _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) __________ Information from ESET NOD32 Antivirus, version of virus signature database 3754 (20090109) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 3754 (20090109) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field)
