American Standard® Gas Water Heater, Series: GSN, 40000 Btu/hr Heating, Liquid Propane, 50 gal Tank, Spark Ignition, 3 in Vent, 38 gph Recovery, Energy Factor: 0.6, 3/4 in NPT Water Connection, 150 psi, Tall or Short: Tall, Ultra Low Nox: No, Aluminum Anode Rod/Steel Tank, 20-5/16 in Dia
Vaporshield technology - Shuts off gas and air supply to heater to prevent prolonged vapor burn in combustion chamber should accidental or unattended ignition of flammable vapors occur outside the water heaterMaintenance freeStandard thermocoupleSelf-Cleaning, Non-CFC foam insulatedHeavy gauge steel tank, glass-lined tank, aluminum anode rodFactory installed dielectric hot and cold Water connectionsBrass drain valve, factory installed heat trapsTemperature and pressure relief valveFactory installed energy cut-off systemAll models are certified at 300 psi test pressure and 150 psi working pressureLow Nox