The Rheem Performance 75 Gal. Natural Gas Tall Water Heater comes with a 75,100 BTU/hour environmentally friendly Low NOx burner that provides ample hot water for households with 5 or more people. The piezo ignition system ensures safe and easy startup. Its maintenance free combustion air intake system means there are no filters to clean and replace. A premium grade anode rod provides long-lasting tank protection. Factory installed temperature and pressure relief valve and 1 in. water connections are included with the water heater for easy installation.