The GeneralAire 7011 is the correct replacement orifice and strainer for the following humidifier models:
The GeneralAire 990-37-74 Orifice/Strainer Assembly is a replacement orifice and strainer assembly for the GeneralAire 1099 Legacy series humidifiers. The 990-37-74 is a low water pressure assembly kit, measuring 20-40 psi. For a standard water pressure orifice and strainer assembly, see the 990-37-75 model. This orifice/strainer assembly attaches to the solenoid valve assembly and helps keep your Legacy air cleaner fully operational. This is a genuine GeneralAire replacement part and is made with high quality material.
GeneralAire 990-37-74 Orifice/Strainer Assembly specifications: