The Rheem SP20175D High Altitude Orifice Kit is specifically designed for natural gas applications at elevations between 5001 and 6000 feet. This kit includes precision-engineered orifices that optimize gas flow for efficient combustion in high-altitude environments. Constructed from high-quality materials, it ensures durability and compliance with industry standards. The kit is compatible with various Rheem water heater models, making it an essential upgrade for homes in elevated regions. Its easy installation process allows for quick adjustments to gas systems, enhancing overall performance.