Tracked down the trickle of water draining out from under my Kantleak (2015 GD) panel. There's a slow drip of water from the outdoor shower head. It seems that what I assumed is an on-off valve for both hot and cold is actually "full-on" or "half-pressure." Turning as much as I can (or as much as I can respecting that it's all made of plastic!) it never fully shuts off the water flow. The on-off at the handle just isn't strong enough to prevent the full pressure of the system and ejects the offending water.

I've googled till my fingers hurt but I can't find any info on this unit. Throwin' it out there to the group.