I think it is worth repeating that the TRP line of vacuum pumps are a tremendous deal. Extreme quality for a small price. These pumps new sell at the price of other brands used pumps. That doesn't mean that they are inferior. That is not the case at all. In fact, they are so confident, they offer a lifetime warranty. What? Are you serious? Why yes we are. These pumps have a lifetime warranty. Parts are in stock for maintenance as well. You really can't go wrong with these. There are different sizes to match your application as well. These pumps have been very popular for use with a vacuum oven for botanical extraction. Let us know if you need help building an entire vacuum system.
Here is the link for more information about the TRP line of vacuum pumps.