Need a water softening device for small TT

Go to home Depot, Lowes, or any other supplier of home water treatment devices. Buy the same thing you would get at Camping world for about half the price, and get better results. Drain your water system and hot water tank each time before storing. No water in the systems means no deposits. Any buildup you get is from standing water, not if lines and tank are in use. When you get you rig out of storage, it is very simple just to connect the water line, and fill the heater tank.

Rig the filters with quick disconnect, then you can just snap them loose and drain for storage also.