Soft copper without fittings or CPVC depending on diameter would be suitable. Drain it with a shop vac and if you don't get all the water out who cares.
Ron Fletcher Aero Automatic Sprinkler 21605 N. Central Ave Phoenix, AZ 85024 P: 623.580.7836 F: 623.434.3420 C: 602.763.4160 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of George Church Sent: Friday, February 20, 2009 10:42 AM To: [email protected] Subject: RE: underground pre-action piping You could put a saddle on the ductile, come off with 2" and have an extension on the valve operator come up above grade; discharge of the drain couldbe piped away or directed into a big hole with crushed stone, depending on the volume and perc tests. Don't know if DI holds air, that's pretty challenging. I'd think you'd be better off wrapping grooved galv. Might want to see if a glued large diameter plastic is available if you only carry a small supervisory air pressure on the preaction. There's "rumor" of a prob with galv not holding up well, details to follow soon. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Paul Pinigis Sent: Friday, February 20, 2009 11:01 AM To: [email protected] Subject: RE: underground pre-action piping I would suggest mechanical-joint cement-lined ductile iron, but I do not know how you are going to drain it short of putting in a pit. Paul Pinigis, P.E. Life Safety Department Head -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Lori Kitchen Sent: Friday, February 20, 2009 10:14 AM To: [email protected] Subject: underground pre-action piping We are working on the underground for a project where a remote building is to be protected by a pre-action system whose valve is in a different building 50ft away. The underground connecting these two buildings is to be part of the pre-action system (piping filled with air). In other words, the pre-action valve is in building A. The piping runs underground (after the valve) to building B. This is a new one for us. My questions are what type of pipe do you use for this purpose and how do we drain the water out of the underground? I appreciate any info! Lori Kitchen Whitewater Fire Sprinkler 316-295-4120 (office) 316-295-4162 (fax) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (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: [email protected] To Unsubscribe, send an email to:[email protected] (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: [email protected] To Unsubscribe, send an email to:[email protected] (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: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
