The Suburban Direct Spark Ignition Gas/Electric/12 Volt Relay Water Heater is the perfect solution for your hot water needs. This 6 gallon model (SW6DEL) is designed for maximum efficiency and comes with the following features: Direct spark ignition with a 6 gallon capacity Benefit from a high recovery rate of 12,000 BTU/hour Constructed with a durable porcelain-lined steel tank, mirroring the longevity of residential tank water heaters Features a replaceable anode rod that serves a dual purpose by protecting against tank corrosion and functioning as a drain Backed by a 2-year limited warranty, with an additional 3-year tank limited warranty for added assurance Easy to install access door and frame, sold separately below, for convenient accessibility All part numbers 5240A, 5140A, and SW6DEL correspond to the same water heater model SW=Suburban Water Heater, #=Gallon Tank, D=DSI, E=110V Electric, L=Relay, M=Heat Exchange, P=Pilot