Auto Air vent:
The diaphragm closes when water is applied.
The watts cap has to be removed if testing with air.
The factory adds a plug for testing. Then installs the WATTS cap.
See the limits of the valve.
Do not exceed with air pressure.
The factory adds a plug for testing.
Manual Air vent:
VNT00001
VNT00002
VNT00034
SEE DRAWINGS