Sorry flatbeddennis that it took so long to respond to your question, but yes I have two planes with the fueling valves and I just plug in and fuel and nothing goes to the carb.
fossil

"Quote"
Fossil
Are you telling me that you just plug in the nipples and fuel up and no fuel at all goes to the carb. I got 2 in a row that flood my carb 99% of the time.
Dennis