Not on Avsim and I can't remember from where. Since the Readme makes it freely available, I'll put it on my page in the morning.
In a message dated 14/08/2005 20:28:14 GMT Daylight Time, gwinsk@xxxxxxx writes:
This gauge, just a red button, is REFILL!REFILL It takes about three presses to completely fill the tank. Pity it doesn't just run, like the Dump valve. Still, can't have everything.