[Brent Deines]

Originally Posted by harrellbenjamin

The problem with the theory that vacume will remove moisture is this.Water is a liquid.To remove it from a pit the liquid(water) would have to be pulled in a vacume that lowers the boiling point so it would turn to a gas.Water will boil at approx 28-29 inchs of vacumeThis gas could then be evacuated by the vacume pump.A good grade commercial vacume pump used in refrigeration HVAC can only pull 29.7 inchs of vacume.A perfect vacume is 30 inchs and can not be acheived in atmosphere.Trying to use a mityvac or any similar device is a waste of time and money.It will not pull the inchs of vacume long enough to work.

Amen. I've been preaching that for years but you said it much better than I could have.