thats ok then
for a home fill you'll need a dive tank with air in it or a compressor and one of those fill station things, duno what theyr properly known as.
anyway you put your fill nipple into the female reciever thing, then open one valve then another, when your tank full.. close the one valve and dump the air thats between your tank and the valve.
i think thats how you do it.. something along the lines of that..
i always get my mate to do it..
im not 100% sure so have a look on google or something (Y)
chris
sorry for using "thing" alot of times, im not the most technically advanced person