Heh I used to have one of those too, the OTC brake bleeder kind, fucking thing was only fit for salvaging the vacuum gauge from it, the gauge seal broke and it won't hold a vacuum anymore. Complete heap of steaming police officer, first time it was used it bloody broke, and it was only being used for a vac filtration through a fucking buchner. Not what you'd call hard vacuum. Just fell to bits, total sack of dog shit. Hopefully this one, that came with a filtration funnel itself as a freebie along with the funnel and an erlenmeyer.
And ren-lol, well there really isn't much to describe about a gas inlet. Its about 3 inches give or take of hollow glass tubing with a 24/40 joint either end, male and female, and a hose barb poking out the middle. Not what one could call the most sophisticated piece of equipment in the lab, or the hardest to find or priciest. Bought a pair of 'em for about the price of a burger and a large coke, inc. shipping. Total cost a few dollars. Although thats one of the few times the chinese haven't undervalued the shipping. Not like I was buying another Kipp gas generator, or a large multi-necked flask, or anything really exotic. They are just a couple of cheap and simple, although perfectly functional pieces of glassware for pumping gases out of a flask used to generate them, and the top joint allows for a pressure-equalized addition funnel for when one is generating something gaseous with a liquid and a solid, the funnel (got a pressure-equalized funnel of that sort too although it isn't new) is similar to a separatory funnel, with a stopcock and a ground glass joint at the bottom, only it also has a sidearm that connects to a short stem just above the top of the joint fitting and leads back up inside the funnel so that when adding a liquid you can do it with the addition funnel stoppered and clipped without having to worry about the liquid draining only until a vacuum is created above the surface of it, stopping any more from coming out properly, which happens with separatory funnels. The equalizing tube allows a return flow from the system as the liquid drips or pours out of the bottom, as one sets it to do depending on what you might be doing and how fast you want the gas to be flowing.
Useful for things like piping chlorine gas into things, with say, potassium permanganate in the generator flask, tubing on the hose barb leading to a glass pipette with the bulb taken off so it bubbles through into whatever it is you want to be filling with chlorine, and adding hydrochloric acid via the pressure-equalized funnel. Quite convenient, and sure beats something like using a plastic bottle with holes burnt through it and tubing epoxided on, squirting in the acid with a syringe (I don't mean the likes of the kind used for injecting people, this one is all made of glass and holds about 150ml, nearly a foot long and a couple of inches wide, and the cannula needles for it, those are at least a foot long from attachment point to the sharp end. Although I do have smaller glass ones, 10 and 30ml ones, but still, even if they weren't used repeatedly for all manner of potentially poisonous things and corrosives, and the odd poisonous corrosive, then that would be a HUGE volume of fluid to inject a person with, the needles are big and wide bore and would hurt, and shit, who the devil would want to shoot up with a long, flexible, bendy, wide needle tip thats a foot long or close to it?
And I'd hate to see the heroin habit on some poor bastard if they needed a bit under a third of a liter of water to dissolve the amount of gear they'd be shooting...christ, it'd fell an elephant. And withdrawals, that is something you don't even want to think about, damn. Opiate withdrawals usually aren't fatal, but that just might be.