The Rheem SP20174J High Altitude Orifice Kit is designed for liquid propane (LP) systems operating at altitudes between 5001 and 8000 feet. This kit includes all necessary components to adjust your gas appliance for optimal performance in high-altitude conditions. By ensuring proper gas flow and combustion, this orifice kit enhances efficiency and safety. It is compatible with various Rheem models, making it an essential upgrade for those living in elevated regions. Ensure your gas appliance operates effectively with this specialized orifice kit.