Dead possums is T.M.I. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jamie Seidl Sent: Friday, February 09, 2007 2:28 PM To: [email protected] Subject: RE: WATERFLOW SWITCHES
I've also heard about dead opossums and other rodents rocketing out of broken underground lines. Chlorination anyone? (maybe I do need another water filter...) Jamie Seidl Affordable Fire Protection, Inc. Design Department P - (800) 862-7860 F - (704) 892-0157 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thom McMahon Sent: Friday, February 09, 2007 12:47 PM To: [email protected] Subject: Re: WATERFLOW SWITCHES There is no sudden pressure drop with the old "Angle drain Globe Valves" since they are slow open and close. The newer test and drain assemblies with 90' lever action ball valves could cause a sudden pressure drop, but water being basically non-compressible anyway, we're not talking a lot of movement here. In thirty years, I've seen broken vane type flow switches, but in every case it was not the installed location, but what just happened to try and flow past it. Rocks, baseballs, nuts and bolts from MJ connections someone left in the pipe, or my all time favorite a 1/2" ratchet wrench with the 11/4" socket still on it. (Don't go thereabout flushing! Yes they were flushed, and we typically found these items after a fire or broken pipe, from a forklift or something.) The socket wrench was from we believe a tie in for a new building done a year before about 200LF down the main. (By Others) Thom McMahon Firetech, Inc. 2560 Copper Ridge Dr Steamboat Springs, CO 80488-2136 Tel: 970-879-7952 Fax: 970-879-7926 ----- Original Message ----- From: "Ron Greenman" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, February 09, 2007 9:23 AM Subject: Re: WATERFLOW SWITCHES > Since you can only use a vane switch in a wet pipe, and since there is > no sudden inrush I think the concern was more with being too close to > the main drain where there would be a sudden pressure drop that could > pull the vane backwards, either damaging the mechanism or pulling the > vane off the shaft. > > On 2/9/07, George Church <[EMAIL PROTECTED]> wrote: >> Sure you weren't thinking of a DPV or deluge? >> >> There's not a sudden inrush of water above a Alarm check. >> >> glc >> >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Bill >> Minkel >> Sent: Thursday, February 08, 2007 6:39 PM >> To: [email protected] >> Subject: RE: WATERFLOW SWITCHES >> >> I have been told that when the flow switch is too close to an alarm valve >> the sudden flow can damage or tear off the vane. Just what I was told >> once, >> notta clue if it's a valid concern >> >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> > > > -- > Ron Greenman > at home.... > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
