Compatible with a broad range of 1F90 series and 1F70 series units (excluding Blue models)

While the 190°F rating may match

Which Series use this specific gasket

this component ensures the exact BTU input required for stoichiometric combustion

Secure Termination: Features standard 1/4-inch male quick-connect terminals for fast

Lochinvar & A.O. Smith 100027491 Orifice Compatible with a broad rangeThe Lochinvar & A. O. Smith 100027491 Orifice is a high precision gas burner component engineered for specific water heating and pool heater applications. Featuring a 1 2" HEX RH (Right Hand) design, this direct replacement orifice ensures calibrated fuel to air ratios for optimal combustion efficiency. This part serves as the current manufacturer authorized update for the legacy 076243 030 part number, maintaining the exact tolerances required for