The Rheem SP20175L High Altitude Orifice Kit is specifically designed for natural gas applications at altitudes between 5001 and 8000 feet. This kit includes orifices that are calibrated to ensure proper gas flow and combustion efficiency in high-altitude environments. Constructed from high-quality materials, it meets industry standards for safety and performance. Ideal for Rheem water heaters, this kit is essential for maintaining optimal operation in challenging conditions. Ensure your gas appliance operates efficiently and safely with this specialized orifice kit.