The Rheem SP20175M High Altitude Orifice Kit is engineered for natural gas systems operating at altitudes of 5001 to 8000 feet. This kit provides orifices that are specifically designed to optimize gas flow and combustion in high-altitude conditions. Made from durable materials, it complies with industry safety standards, ensuring reliable performance. Perfect for Rheem water heaters, this kit is crucial for maintaining efficiency and safety in gas appliances at higher elevations. Upgrade your system with this essential component for optimal operation.