This part is widely used in Weil McLain CGi and CGa series residential gas boilers

it features a #46 drill size essential for maintaining the correct gas flow rate and BTU input across the burner rack

and sleeve required for 1/8" O

leak-proof transition between a 1/8" NPT female pipe thread and 1/8" O

York S1-029-21182-042 Orifice This part is widely usedThe York S1 029 21182 042 Natural Gas Orifice is a precision engineered brass component essential for managing fuel delivery in residential and light commercial gas fired equipment. This #42 drill size orifice is manufactured to strict OEM tolerances, ensuring a consistent BTUh input per burner by maintaining a fixed diameter of . 042 inches. For veteran technicians, this part is a standard requirement when performing natural gas to propane conversion