This Summerset Grills (SSGT-1HR) one-hour automatic gas timer shut-off valve features 1/2 inch NPT pipe fittings on both ends and is perfect for any commercial application that offers a gas grill and wants to limit their gas use. Works with natural gas, bulk liquid propane tanks and standard sized liquid propane tanks. For liquid propane use, must not be installed within 18-inches of the grill. The 1-Hour timer accommodates 1/2-inch NPT piping on both ends. The dial is marked in 4 15 minutes increments (any position in between is an estimate of that 15-minute block). The timer dial will auto-rotate (counter-clockwise) and will shut off the gas supply when the dial reaches off. Rated up to 100,000 BTUs/ Max temperature 125 degrees Fahrenheit. This will ensure proper timer operation. Bring utility and safety to your gas grill with the Summerset Grills (SSGT-1HR) 1-Hour Automatic Gas Timer Safety Shut-Off Valve with Emergency Shutoff. Built with matching durable 304-grade stainless steel to weather the elements, this automatic gas timer features a simple and sleek design, 1-hour setting, and limited Lifetime Warranty.