EMC Water Eater. Model 120G-SS. S/N 6590704. 316L Stainless Steel Tank. Covers & stack, 12 gauge, maximum evaporation rate 17 gph: Batch Mode 12 gph: Auto-Fill Mode. Tank capacity 120 gallons. Tank construction 12 Gauge Tank w/ 1 in. Insulation; 16 gauge painted exterior tank height 36 in. Heating System Gas: Natural gas or propane; 200,000 btu; 81 in. x 6-1/2 in. Heat exchanger dimensions 43 in. L x 35 in. W x 54 in. H. Utility requirements 3/4 in. Gas line 7 in. to 14 in. W.C. 120 VAC/13 Amp/1 Ph Drain Funnel Floor; 2 in. Drain & plug.