I haven't tried it yet, but I'd like to at some point. I've seen that link before though. I do like how it mentioned being very careful about ensuring it doesn't go into the lungs because that will NOT end well. It's a must read if you are even thinking about it.
I did however do a little research on the items you might want to get. The aforementioned link doesn't go as in depth as to what I would like.
As far as I can tell, you'd want silicone tubing since other materials could be toxic. Especially, you have to be sure there's no lead content.
To do so, you'd probably want enema bag kits. I know what you're probably thinking, but nothing says you can't use it for something else.
The largest I've seen is 3 liters. Not sure if there's Y-shaped adapters to attach another one or how you'd go about it.
The average human stomach is a little under or about half a gallon, though with stretching I've heard of two gallons. Recall that a gallon is around 3.78 liters. So if a 3 liter bag isn't enough, I would be truly impressed.
For gravity to work the bags would have to be above your head. I have seen IV stands for sale that would do the job.
There's probably a lot I haven't thought of, since I haven't done this before, but perhaps some of the items I've mentioned may be of some help.
