A.O. Smith GPVX-75L ProMax SL Power Vent 7 Gas Water Heater with Side-Mounted Recirculating Taps, 5 gal Blue Diamond glass coating provides superior corrosion resistance compared to the industry-standard glass lining All models feature an exclusive 3-position rotatable blower outlet which adds flexibility Combined horizontal and vertical vent runs up to 180 equivalent feet with 4-in diameter venting (ABS, PVC, CPVC and polypropylene) State-of-the-art electronic gas control provides more precise temperature control; LED control light displays operation status information Factory-installed T&P and a durable, tamper-resistant brass drain valve are positioned for service accessibility