Reddit reviews FJC 6912 Vacuum Pump 5.0 Cfm
We found 2 Reddit comments about FJC 6912 Vacuum Pump 5.0 Cfm. Here are the top ones, ranked by their Reddit score.
Single Stage Pump 5 CFM75 micronFitting 1/4 inch MF x 1/2 inch Acme1/3 HP 1725 RPM12 ounce oil capacity
When someone mentions the word "vac" in regards to bho it is referring to a vacuum or the process of vacuum purging. Basically you have a vacuum pump that is attached to a chamber which you place your under purged oil in, then by gently heating(100-120) and maintaining a vacuum of 29hg your oil will begin to purge. Here is a link to an example of the vac I use, and one to the chamber I use with it(or one that's very similar by the same buy).
I've been using this one: https://www.artmolds.com/vacuum-chamber.html with a vacuum pump I got off Amazon (they didn't have the bundle when I purchased, I got this one https://www.amazon.com/gp/product/B000XQ2S4M/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 ) and it works fine. It just fits a 10 qt bucket if you take the handle off, so that's nice. That is about half the size you're talking about, though...