I bought mine from OP Tanks in Ogden, Utah. They also make 210 BBL Tanks, 300 BBL tanks, mud tanks and sand tanks. You can see products at http://www.optanks.com
These models have a fuel selector switch that is vacuum operated, near one of the tanks. First, check to make sure the vacuum lines are intact and connected. If so, a new selector switch must be purchased and is available from most part stores. It depends on the year of truck you have on 1985 and newer there is a electric switch and you have to pull instrument cover to get to it. If you are having trouble changing tanks it might also be the fuel pump is bad in one of the tanks.. So listen to each tank and see if you hear them run when you switch tanks
A vacuum does not make sound. Unlike a vacuum cleaner, which does!
I think you have to make it out of plastic then connect to the vacuum
No 
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No, light does not make noise when it travels through a vacuum.
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Vacuum sealing clothes does not make them lighter, but it compresses them to save space.
oN AN exit