Nitrous plumbing A1A...??..

How the nitrous has The Purge I was thinking of some kind of way to purge the fuel is well? I reckon it would be circulating close to the solenoid if I did it that way but still I would like to know that it is actually spraying.. in my mind I had like a button I could push that would activate the fuel side and just tap it a little bit and have the motor bog down or watch my wideband O2 sensor go rich for a second...??