Mobile-Soft-Water Portable 16,000 Grain (tm) Unit with Tank, Tank Head, Lead Free NSF 61 Male GHC Tank Connections, Distributor, Resin and Instructions. Used in Rv & Car Wash Applications. 16,000 grains Total Hardness Removal Portable and Manual Removes Total Hardness and Soluble Iron Suitable for Recreational Vehicle Use 9 LEAD FREE USEPA, NSF61 Approved Water Connections Includes Manual