Rheem® Gas Water Heater, Series: Professional Classic Plus®, 65000 Btu/hr Heating, Natural Gas Fuel, 50 gal Tank, Hot Surface Ignition, Direct/Power Vent, 3 in Vent, 65.7 gph at 90 deg F Recovery Rate, 0.65, 3/4 in NPT Water Connection, Tall Tall or Short, No Ultra Low NOx, Indoor Indoor/Outdoor, 21-3/4 in Dia x 68-3/8 in H