Hi all, I was hoping to get some insight on vacuum systems. I am currently trying to set up a high-vacuum via a roughing pump (mechanical) and a diffusion pump. I have a LN2 cold trap and a water baffle in between the diff. pump and base plate, and the mech. pump will most likely be connected somewhere to the diff. pump. My question is, how might I best vent my system once the vacuum has been made? Specifically, what piece of hardware would work the best in theory here, and why? Also, if anyone knows what might be the best way to attach a mechanical pump (via a hose) to a chamber, that would be helpful. Thanks so much.