There may or may not be a listed solution. Metraflex, the maker of Metraloop also manufactures flexible connections for the mechanical trades, and there are flexible connectors for supply and return mains that are commonly used at cooling towers and building service entries, as well as flexible pump connectors that are made of the same materials as their listed sprinkler seismic joints, but that are not listed for sprinkler use. And they may or may not have the corrosion resistance you'll need without special treatment, preferably factory-applied coating of some sort.
At Disneyland, there are sprinklers in the Indiana Jones ride that have to move with the features they're built into. Same with the carriage that guests ride on in the Captain Eo attraction. They use a ball joint designed specifically for a certain range of movement, but not sure if 3' is considered a lot or a little for some of these applications. I would focus my energies on the flexible hose solution - www.metraflex.com. Steve L. On topic for one lucid moment -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, June 04, 2014 1:34 PM To: [email protected] Subject: Listed Flexible Hose? I have an application for a floating dock with a standpipe system. The dock is connected to the seawall with an 8' long ramp which moves up and down with the tide ( approx. 3'). I need to connect the 4" main at the seawall to the 2 1/2" horizontal standpipe on the dock with some kind of flexible hose. UL listed if possible. Any suggestions? Thanks Bill Menster WFM Consulting Inc. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
