My wife usually gives me my enemas while I first go down on her and then have sex with her. We both love this - well, she loves the sex and I love both; she puts up with the enemas). After a couple of messes (thankfully just water) using conventional equipment, I invested in a double-balloon nozzle purchased on a very large ecommerce site. Unfortunately, I found it completely unusable. It's just too big for me, and I'm a pretty big guy. It was 50/50 inserting the nozzle, and even when I was able to successfully get it in, it was very, very uncomfortable.
I next tried an "Enema Retention Flexible-Inflatable Nozzle", which has one ballon, similar to a foley cath. That worked great at first, but those are designed for one-time use in a hospital setting (probably what they use for barium enemas these days?), and can get pretty gross after a couple of uses because the balloon is just secured to the nozzle with some sort of thread (surgical)?, and the thread is impossible to get completely clean. Worse, the inflation pillow has failed on us a few times (allowing the balloon to deflate), and we've had just as many mishaps with that type of nozzle as we did with conventional equipment.
In researching alternatives later, I came to realize that my original double-balloon nozzle, and all those of that style readily available in the US, so far as I can tell, is a silicone nozzle with a 750 CC outer balloon. I still really wanted a reliable inflation nozzle, but that size just isn't an option for me. A popular enema equipment specialist website (not sure if kosher to mention the name here?) has two size nozzles listed on their site, one similar to mine with a 750 CC outer balloon, and another with a 500 CC outer balloon. Unfortunately, the 500 CC model has been out of stock for months.
I finally found an alternative on an auction site, which I'm excited to try. By searching the U.S. listings, I found the same nozzle OP describes. I found it intriguing, but some of the feedback regarding the two bulbs sharing a single air supply were slightly negative. However, in reviewing that feedback, I was able to find an international listing for exactly what I was looking for, a double-ballon nozzle with 250 CC balloons. It also appears to be latex rather than silicone, and I'm hoping the combination of smaller size and softer material will be exactly what I need. If you want to check it out, search ebay for "Balloon double rectal tube enema nozzle", and check out the international listings. 59 GBP for the nozzle and another 12 GBP for shipping. That translated to $102.53, all in.
Mine shipped from Germany yesterday, and it should be here by the end of the month. I'll follow up with a review after a trial run.