"Dave Hall" wrote in message
...


A shop vac should "suck more" than a DC, if we are talking actual
suction. The DC should move MUCH more air. There is a difference. Kind
of like a garden hose with 50 PSI of water vs. a firemans hose with 5
PSI. The garden hose will put out water at more pressure and would be
my choice for washing the car, but the fireman's hose will put out
more water volume and would be my choice for filling a swimming pool.

Dave Hall

Are yuh shure bout that 5 psi on a fire hose??? It takes pressure to shoot
a stream of water a hundred feet.