Afternine and Cleanbean---Thanks for your replies. I reduced the weight of the plug by turning off some metal in the middle. Formerly, it was a 1-1/2" diameter cylinder about 3" long with suitable shaping on both ends for better insertion and withdrawl. Now the middle is an hour-glass shape with a minimum diameter of about 7/8". I tried using it as a butt plug and wore it while I went shopping and bicycle riding. It felt good.
Then I drilled a 3/16" diameter hole through it to use as a nozzle. I found that I had to cross drill it near the tip because the end kept hitting on the inside of the colon and the water could not flow. Now it works fine.
Because of its hourglass shape, I can put it in half way. Or, I can put it in all of the way. Because it has only a plastic tube on it, it can go in any distance I want--there is no natural stop. I put a thin walled tube on it and when I went to pull it out, the tube came, but the nozzle stayed inside of me. I had visions of the emergency room because I put my finger in and could not feel it--it must have been in the descending colon.. I was lying on my back at t he time, so I tried expelling it. All I got out was a bunch of shit. I sat on the toilet and its weight caused it to descend to the rectum, and I was able to expel it with no problem.
I have since put a thicker walled tube on it and have not had any trouble with its coming apart inside of me. It is fun to push it in so that it is in the descending colon and to run it back and forth in it. Because of its weight, I can feel it moving back and forth. I do not think it will come off of this piece of tubing, but if it does, I know how to get it out.
I can take the tubing off and put the flange back on and use it as a butt plug again.
hankb