I have seen this on a wet system with a shot gun riser and no back flow of any kind. Due to the fluctuation in the city main you could see the paddle move back and forth almost continually, but never staying in one position long enough to outlast the retard system on the flow switch. This switch failed after who knows how many thousands of cycles on the flow switch paddle. Maybe something to look at. Bill Cunningham Plumbco Inc. C.E.T. IV -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Frank Herrick Sent: Wednesday, December 01, 2010 3:07 PM To: '[email protected]' Subject: System Sensor Waterflow leak problem
We have a mixed-use property in our town that has replaced two System Sensor Model WFD30-2 switches within the past year. The leak was not at the gasket-pipe interface, but where the paddle body bolts to the upper assemble. I can recall have replaced a few of these from this manufacture , have any of your sprinkler fitters or inspectors run into this problem with System Sensor waterflow switches ? Thank you, FRANK J. HERRICK City Of Leawood Fire Department Office of the Fire Marshal 14801 Mission Road Leawood, Ks. 66224-9560 Office: 913.681.6788 x 26 Fax: 913.681.2399 Fire Sprinklers Save Lives, Property, the Environment, and Water - Protect what you value most! _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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 [email protected] http://fireball.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)
