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1. | A O Smith Water Heater AOSRG45200 Manual RESIDENTIAL GAS WATER HEATERS OWNER'S MANUAL GAS Thank you for buying this energy efficient water heater from A.O. Smith Water Products Company. We appreciate your confidence in our products. You should thoroughly read this manual before installation and/or operation of this water heater. Pl... Brands:A | User Manual | ENGLISH | [View] | ||||||||||