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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
I think you have to make it out of plastic then connect to the vacuum
A vacuum does not make sound. Unlike a vacuum cleaner, which does!
No 
A vacuum can be produce by emptying a container
Utah's industry is rocket engines,oil ,an honey.
they make $8.50 an hour
how much do dental assistants make in Utah
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The make of vacuum is not as important as making sure that the vacuum cleaner is a HEPA vacuum. This stands for High Efficiency Particulate Air. They remove around 99.97% of allergens in furniture and carpets.