8-Year Limited Tank Warranty, 8-Year Parts Warranty, 1-Year Labor Warranty BLUE DIAMOND® glass coating blend is formulated in the same lab that creates the protection for our industry-leading commercial product line.. Self-Cleaning Diffuser Dip Tube helps reduce sediment buildup inside the water heater tank to preserve high efficiency output for years of trouble-free operation. Commercial-Grade Dual Stainless Steel Heating Elements - Stainless steel sheathed, screw-in, direct immersion, 4500-watt, 240-volt heating elements for maximum efficiency and longer life. 3/4” top water connections Exclusive COREGARD™ heavy-duty anode rod with stainless steel core, top-mounted for added tank protection Built-in electric junction box located on the top and ready for 1/2” or 3/4” conduit. Thermostat/High Limit Control allows adjustment of water temperature while providing overheat protection. 3 inches of “Environmentally-Friendly” Non-CFC foam insulation Factory-installed CSA rated and ASME rated Temperature & Pressure relief valve Factory-installed durable, tamper-resistant brass drain valve