Specifies whether or not the vent pipe has an umbrella fitting. Select Y (for yes) if the vent stack slips inside of the piping system, or N (for no) if the vent stack is connected to the piping system.
Umbrella Fitting Example
The vent stack pipe is not hard-piped to the relief valve pipe. The relief valve pipe slips inside of the vent pipe.
Non-Umbrella Fitting Example
The vent stack pipe is hard-piped to the relief valve pipe.
