Typical floor drain will result in water all over the place when you do test. Should ask for at least a 3" HUB drain, provide adequate air gap to comply with applicable plumbing code. Hub drain is typically what is used for things like condensate discharge off of HVAC units or other drained discharge from equipment where you can not have a hard piped connection to waste piping. Other thing to ask is if there's any restrictions by the local sewer district with you discharging sprinkler water into the sanitary sewer system. In some jurisdictions it's considered contaminated and is not permitted to be discharged into the sanitary sewer system. Just ask up front to ward off any surprises later.
Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.lg.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Russell Sent: Thursday, August 16, 2007 11:08 AM To: [email protected] Subject: RE: Main Drain Question When you wet trip test the dry system, will the drain take it? Ron -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Sornsin Sent: Thursday, August 16, 2007 10:19 AM To: [email protected] Subject: RE: Main Drain Question Without looking up the precise verbiage in NFPA 13, I say YES. The Main Drain test is a water supply test - done to verify (to a degree) that the incoming supply fully functional. This is done by comparing the current test results to the previous. Conducting this test on the dry system you describe would serve no purpose. The drain at the primary controls would be used for that. Thus the dry system's drain is really an auxiliary drain used only when the dry system is being modified or maintained. I say go ahead and pipe to the floor drain. Mark A. Sornsin, PE Fire Protection Engineer Ulteig Engineers, Inc. Fargo, ND 701.280.8591 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John T. Johnson, CFPS Sent: Thursday, August 16, 2007 8:33 AM To: [email protected] Subject: Main Drain Question Hello Members, We are installing a new wet system. Off of the wet system is a small dry system with 6 sprinklers to protect a porch area. For us to pipe the main drain of the dry system we need to core 2 walls to get to the outside of the building, go up about 15'-0" to the roof of the porch, and for the most part follow the dry system piping to the end of the porch. My question is: If the control valves between the wet system and dry system are tampered & monitored by the building fire alarm to ensure that they remain open, can we use the main drain on the wet system to fulfill the main drain test requirements, and just pipe the drain of the dry system to a floor drain? Thank you in advance, --------------------------------- Sick sense of humor? Visit Yahoo! TV's Comedy with an Edge to see what's on, when. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.8.13/843 - Release Date: 6/10/2007 1:39 PM Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.8.13/843 - Release Date: 6/10/2007 1:39 PM _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
