ABCwaters Built Portable Water Softener with Handle, 8,000 Grain Capacity, Perfect for Your Mobile Home, Park Model, Tiny Home, Pressure Washing, Car Washing, RV, Boat or Yacht Easy transportation, ideal for RV's, boats or car washing. This is our smallest size with 8,000 grain capacity (6x18" tank). Regenerates with table salt or rock salt. Simple in/out head with fill port to add salt. Now includes custom handle for easy carry and security.