Last night I put my GFCI to the test, live with SW, thankfully it worked. I was trying out a new Vortex Diatom filter, one of the hoses popped off while I was trying to prime the thing. Needles to say water everywhere and straight into the surge strip I had it plugged into, instantly the GFCI tripped, I was wet, down to my feet in a puddle of water, thankfully nothing else happened. Just to show you that in a split second things got out of hand so quickly and disaster struck. I think better instructions & connections may of prevented this but I guess anything can happen, otherwise the filter works great.