This is a great system for the RV. It combines simplicity with price. The unit is light weight and has the ability to take out up 325 - 750 gallons of hard water before needing to be regenerated with simple table salt.
The unit comes with:
6 x 18 Fiberglass Resin Tank
.25 Cu Ft High Capacity Resin
In/Out Head with removable top for brining.
Warranty: 10 years on the tank and 5 years on the head