There is no transmission vacuum hose. That is a vent hose.
The vacuum hose should connect to the back of the intake manifold.
From the booster, to a vacuum source on the engine.
Your question is to vague to answer. If you connected a vacuum hose to a water hose you would be ingesting water into the engine.
There are several vacuum hoses. They are the small black tubes that connect things.
Depending on Yr/Make/Model, it usually connects to the intake manifold, TB or a T fitting in the vacuum hose to the HVAC.
that is a vent hose. it hangs freely. does not connect to anything.
PossibleThe vacuum diagrams are too large for me to post here. But you can get them at the Public Library in the Reference Section.
the vacuum hose connects to the airbox
The best way to repair a vacuum hose on your Chevrolet is to replace the vacuum hose. The vacuum hose is held in place with a retaining clamp on each end of the hose.
In both Chiltons and haynes, there is a vac. diagram
You look up the size of the hose from the instructors manual that came with the vacuum you purchased. Then you look for stores near you which have the hose your vacuum needs and then you buy the vacuum hose.