Hi.
There are plenty of posts and related discussions about the rubber colon tube (also called rectal or flatus tube by some manufacturers), its diameter, length, rubber vs silicone, and preference over nozzles and vice versa. Honestly, I do not have the time to read up on all of it because there is so much on Zity about enema equipment and everything else that is related to enemas. Not to mention all the other interesting information about all that can be done with the anus itself.
Personally, it is fantastic to know that there is so much interest in enemas and everything related, but since I have other commitments (including earning a living so I can eat and pay my bills), I will have to wait until I retire to read up on everything. I am happy to have learned that I was not the only one in the universe who loves enemas.
Personally, I prefer the good old rubber colon tube for my enemas because this is how I received my first childhood enemas in a Hospital in Italy. So I guess that I am biased. Also, I find it easier to handle a colon tube rather than a nozzle whilst practicing solo since I'm the only one who likes (and consumes) enemas in my family. I do plan to experiment with some of the thicker nozzles sometime in the future.
Some of you have said that you prefer nozzles because it allows you to instantaneously feel the liquid gushing into your rectum causing it to expand under pressure, thus producing all the related wonderful sensations in that particular organ. This is because it is in the rectum and the attached anus where the specific nerve endings are strategically located that detect sensations like pressure and heat. Be aware that the nerve endings in the colon cannot detect heat so the membrane of your colon will scald before you figure out that the liquid is way too hot.
Yes, a colon tube will bypass the rectum (provided that it is inserted higher up) and deliver the liquid higher up the colon, thus you will experience a delayed reaction because the liquid has to flow down into the rectum. Therefore, some people prefer the delayed reaction because they can achieve a deeper clean by taking more liquid onboard before they experience the urge to expel. Because of this delayed reaction, I advise you to test the heat of the enema liquid just like when testing a bottle of milk before feeding a baby - run some liquid on the bare skin on the underside of your forearm first. If it is too hot for the skin (membrane) of your forearm, it will be even hotter for your intestinal membranes.
Another advantage of taking an enema with a colon tube is that the positions of the recipient are not as limited as when using a nozzle because as stated, the colon tube naturally bypasses the rectum thus delivering the liquid higher up. With a nozzle, you are limited to only irrigating the rectum and then you have to rely on peristalsis and gravity to force the liquid up further into the colon. Therefore, the positioning of the recipient's torso (placing the anus higher than the colon ) is crucial for achieving a good filling and a good clean.
Concerning this, when I and the other boys received our enemas in the Italian hospital in the mid-1970s, we were all required to assume a standing position with our exposed bums to a seated nurse who would insert a good 12-16 inches of colon tube up into our young descending colon before a second nurse standing next to an IV pole suspended with a clear glass canister would flick open the clamp to let the water run into us. This was not the usual conventional way of taking an enema and naturally, my rectum would seriously ache as it expanded under the increasing water pressure. But they probably only gave us 250ml - perhaps the maximum for our young rectums. I guess that the rationale for the standing upright position was that as the water flowed on its way down (thanks to gravity) it would pick up and carry all the turds along the way and deposit them into the rectum where they would wait to be expelled.
Anyway, each one to their own.