Assuming you mean EnderIO's fluid conduits, you can click on them with a filled bucket. Then the conduits are locked to this specific fluid and nothing else can go into the drum.
Can other liquids pass through them though? Like lets say I have 3 drums, and the conduits are going in from the middle, and I have 3 liquids, lava water, and molten iron. Will I be able to make the iron go into the left drum if the middle drum is set to lava? because I had the same problem with the TE Fluiducts where they were set to a liquid, and ONLY that liquid could pass through them...[DOUBLEPOST=1400364401][/DOUBLEPOST]
Didn't think you could get more then one type of fluid in a Extra Utilities Barrel. I believe it locks itself once fluid is added. Though to be fair I have only used the fluiducts to connect them.
I.e. Add lava it becomes a lava drum
It only locks itself while there is liquid inside of it.
I'm using an automatic smeltery, with 13 drums, 1 for every molten liquid that is commonly mixed, and its auto-outputted into a casting basin thus commonly losing what liquid was inside of it, and just sitting inside of the casting basin waiting to be used.
I'm using ME for this now, but would be nice for another map I'm playing on ebecause I don't wanna cheat in the ME cause the conduits are all messed up lol.