Diamond Hott Rod 10 gal Universal Heating Elements - Fits onto your existing tank. High quality 304 stainless steel heating element gives years of water heating service. Includes a fully adjustable thermostat that mounts directly to the tank surface to keep water temperatures from 110° to 170°F; factory preset to 140°F. All necessary wiring and connectors, heater cord, and power cord are color coded for easy snap together electrical connections. Instructions included; installs in approximately 30 minutes with simple hand tools. Fits Atwood: 6 or 10 gal. RV hot water tanks with 1 / 2 " NPT drain opening; Suburban, American & Mor-Flo: 6 or 10 gal. RV hot water tanks with 1 / 4 " NPT drain opening or 1 1 / 16 " hex. Carded. Manufacturer’s Lifetime Warranty. 10 Gal. Universal.