well i went to home depot, bought some flex tube that said 170psi rated (yes i know suck and blow have different affects on materials) .. anyway , i didnt see the tube cave in... i hooked up an automotive vacuum guage with tapered end to the tube and it was a 3/16" ID tube and kind of heated it to open it enuf to slip it onto hte copper tube of the fridge pump where I had hack sawed it free from the condensor/evaporator unit.
Anyway, after 15 min or so of quiet operation from the 1/8HP motor and pump built like a tank, the best i could get was not even 24 inches of vacuum ... This surely is not 29.9 and therefore wouldnt do the job according to the guy from NJ ....
My other idea was to use the intake of an old 3.5 HP b&s lawnmower engine not in use .. to use it's vacuum on the carburetor side to see if it gives more suck than the fridge pump ... what do you think ,?
Do I have a leak in my little rig .. will an internal combustion engine give more vacuum than the fridge pump ?
Should I get a rotary pump off a newer fridge or dehumidifier or air conditioner ?
