The GeneralAire 7076 is the correct replacement valve washer for the following humidifier models:
The GeneralAire 747-11 Humidifier Valve Washer is a replacement valve washer compatible for use with the GeneralAire Legacy Drum Model 65. The 747-11 valve washer fits on to the 81-21 float valve assembly. The GeneralAire 7076 is an OEM replacement part for your 65 model humidifier.
GeneralAire 747-11 Humidifier Valve Washer specifications: