100 Gallon Natural Gas 199000 BTU Tall Commercial Water Heater ASME and Non-ASME Code States*Features:Heavy Gauge Steel Tank incorporating only seven internal flue tubes resulting in fewer critical welds to yield added years of trouble-free service.Inner tank glass-lined with Dura-Glas™and fired at 1600°F for optimum protection from the effects of corrosion.R-8.3 non-CFC foam insulated to save energy and reduce fuel costs by maximizing heat retention.Four anode rods to ensure maximum tank life.Self-Cleaning turbulence inducing cold water inlet-tube engineered to diminish hard water area sediment deposits.Full size hand-hole cleanout for eased tank inspection and/or removal of sediment deposits.Electronic direct-spark ignition system saves fuel by eliminating the need for a standby gas pilot.Automatic[]