Product Description:
ENERGY STAR Certified Bradford White TTW® Defender Safety System®, 40 Gallon Standard Residential Gas (Liquid Propane) Power Vent Water Heater. 6-Year Tank Warranty, 38,000 BTU/Hr., 120 Volts, Single Phase, with Power Cord included. The "-475" indicates that this SKU was designed to operate in Altitudes between 2,001 feet and 7,000 feet. The "-506" indicates that this SKU comes with an A420 Aluminum Anode Rod.
