Westinghouse 140565 - High Altitude Regulator ConversionFor units before build date 0719 on the serial # contains 4 jets#3.9= 6K to 7K#4.0= 5K to 6K#4.1= 3K to 5K#4.2= 2K to 3K
For units before build date 0719 on the serial #
contains 4 jets
#3.9= 6K to 7K
#4.0= 5K to 6K
#4.1= 3K to 5K
#4.2= 2K to 3K