All you want to know about JBL bags

According to wikipedia, J.B.L. stood for joy, beauty, life. https://en.wikipedia.org/wiki/Charles_Alfred_Tyrrell#J.B.L._Cascade This is also how Charles Tyrrell defined it. https://www.gutenberg.org/ebooks/3453 Both of these links are also a good starting point for those who wish to know about the origins of the J.B.L. bag.

I have an old red rubber JBL stamped Klystra that I bought from Tyler many years ago that still works so far. I agree about the relatively low water pressure you can generate from it but I still get a good flow rate, enough to gradually fill me from below and give me a nice inward flow filling feeling while I have the valve open sitting on it. Mine holds almost 6 quarts, and I measured it once so can get almost five quarts into me when I am patient and sit on it long enough to push my butt cheeks all the way down to a nearly flat bag. I love regular large volume bag enemas, but the feeling of sitting on a large vertical nozzle being filled from below as you sit on a warm deflating rubber bag is a uniquely pleasant experience. I really enjoy it occasionally.

Eric

@dr marcus

I have written elsewhere about the origins and models of the original JBL.

Virtually all the discussions here are about knock-offs by Tyler or Klystra and are not applicable.

Their products are NOT the same.

Sean is right on that; the newer ones were OK, but not the same as the original JBL. They felt different sitting on them, and were better made.

Dan

At 250lbs I think you would blow the nozzle right out of the bag! Just fabricate a simple sit on the toilet seat continuous enema as I did in one of my posts

Okay, let's introduce physics here, 250 lbs. over ½ square foot… 144/2= 72 now 250/72= 3.47 and these are just ball park numbers as it depends how much surface contact on the bag itself. Now figure the diameter of the hole of which water passes through which will slow things down, so your pressure and flow of water is not as high as one might think. Now that is actually a good thing as if pressure were really that high, you would be filled up in a matter of seconds and risk internal damage of which would not be fun at all. Now if you think I am BS'ing, take water bottle syringe, fill it, sit on it and open the valve and see how fast the water comes out and you will get a realistic idea of how much water is flowing.

Yes, but that's really simplifying a much more complex physics problem. If you're a large person, your pressure per square inch is reduced. And how much actual surface does your butt cover? And if a 250# person sits on a JBL …. how much of his leg weight is not included in the equation?

I've pondered on this for years. And routinely using a homemade JBL that I've constructed, it really isn't any more pressure than a bag hanging 3-4 feet or above my anus. What I do know is that when nearing the end of the contents …. I have to be patient to get that last little bit in. It helps to take pressure off my feet.

Ideally, I've wanted to connect a line to a pressure gauge, but it's too much trouble to get an answer that I don't really need. All I can say is that there are no known issues with pressure since these were first made.

The situation with the JBL nozzle is more complicated.

Since the holes in the nozzle are pretty small diameter, two things apply:

Orifice Flow: https://www.omnicalculator.com/physics/orifice-flow

Note that the flow is the square root of the head (pressure). So the pressure has to be 4x as great to get a 2x flow increase,

Also, I strongly suspect that the flow though the nozzle holes is turbulent, further flatting the flow v pressure curve.

Both of these factors indicate that the enema solution flow in a real JBL is petty much independent of the sitter's weight. I know that a 220 pound sitter will get the full bag in about 15 to 20 minutes. And poo a lot very soon thereafter.

As I explained …… too many variables.

Since the original JBL can also be used as a fountain syringe with the bag, a hose, and their special nozzle, the flow v. bag height (ie: pressure) can easily be measured.

https://ibb.co/dfjKbLZ

Seems the easiest and most accurate way to measure the average flow rate is to divide the volume injected by the time it takes to ingest.

Or, just enjoy and don’t worry about it! 🤨😀😀😀

@rigel and @jonormal I was trying to point out that the concept of a 250 lbs person does not equate to high pressure on the bag and enema delivery. So far you guys have proved what I was saying. @Sean The formula you cite does not factor for the coefficient of resistance traveling the length of tubing and turbulence from leaving the bag through the connection there, to the connection(s) of the nozzle and any internal resistance/turbulence of the nozzle. You are correct on the turbulence of the holes in the nozzle.

@rigel and @jonormal I was trying to point out that the concept of a 250 lbs person does not equate to high pressure on the bag and enema delivery. So far you guys have proved what I was saying.

@Master_Dorson You pointed that out very clearly in detail and we weren't questioning at all what you said. Engineers (and I'm one) like to quantify and analyze everything down to a gnat's ass. The world needs us!!

My point, building on what you clearly pointed out, was just sit back (er… down) and enjoy it!

All I want to know at this time is: How can I get one of this beautiful devices…