Have a look at some recent photos and videos. Expect more to come in the future.
A Quality Vacuum Pump
The above video performed a vacuum draw down with the Robinair 5 cfm 2 stage pump. No Pressure chamber was used in this illustration.
RECOMMENDED These Robinair Pumps offer the best bang for the buck. They deliver 5 cfm vacuum are reliable, robust and can be gotten new on Amazon from a reliable seller. We have ordered several and all have arrived in great condition and have worked wonderfully for our vacuum former’s. While we do not sell Vacuum pumps you can follow this link and check out what I believe to be the best price around for this particular pump.
If you’re looking to save even more money and a name brand pump costs more than you want to spend. Have a look at this 3 cfm pump on Amazon.
Some photos of a typical configuration with brass connections, valve and hose fittings