Hello, There seems to be quite a difference in spacing of the balloons in the Silicone inflatable nozzles.
I had previously done some research and contacted some vendors and below is what I found:
PN / Sku: AD666 Has balloon spacing of 1.21 inch (Silicone Inflatable Double Bulb Enema System)
PN / Sku: RU710 Has balloon spacing of 1.91 inch (Silicone Double Bulb Nozzle)
Can anyone confirm these values? That 2nd listed one having a balloon spacing of 1.9 inch is useless since it's so far apart, what would be the use? Would basically act like a single balloon nozzle type wouldn't it?
I would think to create a seal, it would not have to be longer than 1.3 inch or so. Anyone know how the german latex ones, the spacings on those? I think the older ones were which tighter and better though. Would be nice to find a nozzle type with 1 - 1.2 inch balloon spacings.
I can confirm that those values that you received for the two are correct (within manufacturing tolerance). The RU 710 is also the longer of the two and has better bulbs and chrome-plated valves that don't leak. It's also the older of the two models.
Most people assume that the balloons have to be closer (more like the latex rubber ones) to be effective. The error in this assumption is that it requires the inner balloon to “sit” on the inner rectal sphincter muscles and seal in order to be effective. Even if the distance was shorter like the German latex ones (a bit more an inch, at 27-28 mm) that wouldn't be enough to work in most cases.
What these double balloon nozzles rely upon is the sealing of the rectum at a distance above the rectal floor (without over inflating them). When done properly, the nozzles won't slide out of the rectum once inflated and will provide an effective seal of the rectum. This deeper tight seal also allows the “top” of the outer balloon to be just at or just slightly within the outer sphincter muscle ring. I've you've done it right, you'll feel the outer balloon pull tight against the outer sphincter muscles to produce the secondary seal of the nozzle when you start inflating it. You'll know it with the very first squeeze of the bulb for the outer balloon if you've got a good seal.
And even though they have a significant diameter when inflated, they can be pushed out while still inflated. Even when filled with air, they have enough flexibility to distort in shape with high enough peristaltic pressure to pop out , still inflated (they are not like solid nozzles that have little of no flexibility.