The KIT-ASSY UNIVERSAL BURNER (SVC) NAT DS1(40,50)S (HI-ALT) M(I,4)503 (HI-ALT) is specifically designed for high-altitude applications in the Bradford White DS1(40,50)S model. This natural gas burner assembly is engineered to perform efficiently in lower atmospheric pressure conditions, ensuring reliable heating. Made from durable materials, it meets safety standards and includes all necessary components for installation. This kit is essential for maintaining the efficiency and performance of water heating systems in high-altitude environments.