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1. | A O Smith Water Heater BTH 400 ManualA.O. Smith Water Heater Parts Fulfillment 125 Southeast Parkway Franklin, TN 37068 Phone: 1-800-433-2545 www.hotwater.com "AT A GLANCE" BTH 300/400 QUICK INSTALLATION TIPS Horizontal Sidewall Venting Vertical Rooftop Venting PRINTED IN U.S.A. 0706 PART NO. 197062-002 ... Brands:A | User Manual | ENGLISH | [View] | ||||||||||