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1. | A O Smith Water Heater BPD 400 Manual AOS PREFERRED-BPD 400 DIRECT VENT COMMERCIAL GAS WATER HEATER GAS-FIRED INDUCED DRAFT FOR DOMESTIC HOT WATER INSTALLATION OPERATION SERVICE MAINTENANCE LIMITED WARRANTY WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasol... Brands:A | User Manual | ENGLISH | [View] | ||||||||||