So I bought a pressure pot but I don’t know how to use it in VIP for the life of me. There are three fittings, two into the regulator and one directly into the pot.
When I use this as a catch pot for vacuum infusion which connections do I use? Also won’t these lines get clogged with resin and render the pot useless?
Yes. 
Fittings and lines need to be cleaned or replaced.
First of all, make sure the container will hold vacuum. If it’s made for pressure, the seals may leak when a vacuum pulls them the other way.
If there’s a tube going to the bottom of the container, use that to connect to the mold outlet. A fitting that ends at the lid is where you attach the vaccum line to the pump.
or use a plastic to metal NPT compression fitting for the mold line. This way you just place your tube from your mold in the hole, and into the bucket, and then when done, pull it back out. Prob’ be smart to line the bucket with plastic liners, incase you start filling up the bucket after 20 infusions 
i replaced all fittings with a ball valve for the vacuum, gauge on another port, and then the compression fitting on the 3rd port. This way I can shut off the vacuum supply and do leak checks.
I really really like your idea riff, sticking the tube all the way in. When I get some time next weekend I think I’ll go get the necessary fittings and start putting it to use.
Thanks!
http://www.mcmaster.com/#compression-tube-fittings/=6muj1b is what I am talking about. This way, the tube goes in, and doesn’t get resin on the connector. I’m sure if you wax/release even a barb fitting, you can wack the resin through the connector.
I like the push-to-connect style air fittings. http://www.mcmaster.com/#push-to-connect-tube-connectors/=6mwql7
I’ve used a push to connect and a barb, and I’d rate the barb many times over. Ours is brass and I just drill the resin out each time, takes 10sec and I wrap a bit of tacky tape around the start of the barb before I push the hose on. I just found the other one more fiddly to clean.
And definitely put something in the bottom of the pot. If it is one of these spray paint pot guys: 
a 20L bucket cut down a little fits real snug.
Here is advice I have from some one .This is good if you have to degas and you can see inside.
I took off stock lid and I made a lid from Lexan… I heard (somewhere) that acrylic could be dangerous because it can shatter. Lexan flexes.
I think it’s about 1/2" thick. I used one of the router bits with a bearing on it and used something round (I don’t recall what, LOL) as a template after cutting to within about 1/8" with a jigsaw. (EDIT: I do remember I used double stick tape to hold the lexan down to the template.)
I used the cutoff scraps as a brace on the lid. (I used some kind of lexan specific glue.)
Finally, drill and tap (Using pipe thread taps) for brass fittings and add a ring of self stick weatherstrip.
It will hold a suck overnight… good enough for me. Kind of fun for blowing up marshmallows and boiling water at room temp
Did you just leave off the screw clamps? I know the atmosphere itself will provide clamping force but I’m curious to know your exact configuration
look at pressure pot pic .You just clamp it down with the clamps on the bottom.The round lexan is substituted for lid that comes with it
http://img37.imageshack.us/i/1001434q.jpg/
http://img245.imageshack.us/i/1001433pe.jpg/
pix are of set up for degas for rubber mold making.Add another line and a vacuum gage and you can do both
http://img245.imageshack.us/i/1001433pe.jpg/