Q: Would it be difficult to modify this assembly to use quick disconnect parts? If so which parts would best work to get that done?
A: quick disconnects can be applied to the valve. The valve itself has 1/2" Female NPT connections-so long as the disconnects being threaded into the valve have that thread type, and style can be used on the other end to connect to your tubign or brewing kettles
Q: Item Number:99-3723 does this ball valve come with the 10 gallon SS pot with one welded port?
A: it is. This would be the valve offered on the kettle addtions
Q: Is this a two piece or single piece ball valve?
A: These assemblies use a 2 piece ball valve.
Q: Can you boil in a brew kettle with an attached stainless steel ball valve assembly? Or does the main boil have to be done in a solid pot? Won't the boil damage the ball valve?
A: You do not need to remove the ball valve assembly to boil, they are intended to stay in the entire time.