Where or who can I get a nos transfer pump rebuilt or buy a new one, I think the one I have is cooked because when I try and fill my 5lb tank from my mother tank they don't fill up.
mopac or recreation supply can sell you one. As for re-build, not sure. Be sure to run a filter on your refill station before the pump. N20 can have alot of builup sediments in the 60lbers and will kill pumps and or things.