(Great?) Sediment Bowl Idea

[pgerhardt]

Having a bunch of cast iron sediment bowls to restore has gotten me to thinking (I know - dangerous!)

Could I replace the valve needle (Picture 1)

With an aircraft type gas tank drain valve (picture 2)

Then before every start I could use an aircraft type fuel testing cup (picture 3) to quickly sample the fuel and check for water or other gunk!

The aircraft drain valve is 7/16 20 which looks very close to the model A needle valve. Does anyone know the size and thread count of the model A sediment needle valve?