hey everyone, i recently made a new co2 cap so i decided to change the whole layout of my co2 system (the air tube layout thingy) so just in case i do run low on co2 or too much i can adjust it quickly and easily to fit the needs of my tank. Anyways i was going to use all these T connectors but then i just remembered there were these gang valves that could connect a few air lines together so i was wondering how they worked. heres a pic of one http://www.petsmart.com/global/prod...<>ast_id=2534374302023693&bmUID=1117471713928 I was wondering if i could stick like 2 air lines into one 4 slot gang valve and be able to close down the 2 empty ones (so i dont lose pressure) and when i need to take one out would i be able to close the 3rd one out too? are they all connected to one line that goes out to the tank?? thanks in advance to any one who answers 
(hope this makes sense)
(hope this makes sense)