DST
Well-Known Member
I got a 1.5cfm pump and a 1.5gallon vac chamber. You don't need to run the pump long at all so not sure where the noise thing is coming from IC3? Once you got your chamber up to the required pressure (around -1 bar or/ -29inhg) you then just close of the vac where the pump is attached and switch the pump off. I then leave my vac chamber (metal pot basically, lol) in a water bath at 100f or 37c (baby bath water temp) and let it do it's thing. When it's stopped bubbling I then let the valve out and eh voila.