Access information about your GPHE-50, including its manual and product specifications. ProLine XE® Vertex™ Power Vent 50-Gallon Gas Water Heater. AOS GPHE-50 Series 100. PRINTED 1207 197424-001. Item Qty. Description Part Number. 1 1 Outer Door 9003545. 2 1 Aluminum Anode 9004335. Help with your A.O. Smith GPHE-50-100 Water Heater manuals, replacement parts, accessories and more.(Buy it Again, Wrench) A.O. Smith Gphe 50. We have 1 A.O. Smith Gphe 50 manual available for free PDF download: Instruction Manual SERIES 100 resIdentIal Gas water heaters. 241 Instruction Manuals and User Guides in category Water boiler for A.O. Smith online. All categories - A.O. Smith 12 50GPC T 100 · User ManualLift Gate Service All products weighing more than 100 lbs. ship via semi-truck. We recommend ordering the GPHE-50 A.O. Smith GPHE Installation Manual. Read and obey all safety messages and instructions throughout this manual. total input of all appliances in the enclosure, but not less than 100.