Trying to Understand Air Pumping

Good morning ya’ll,

I am trying to understand the concept of how Air pumping should work.
I am currently between 5-5/16 and 5-3/8” girth, so ~1.70” diameter.
Per the charts and the information in this section that would put me in the 1.75” cylinder size.
My fear or lack of understanding, with only .025” of clearence a side is I will quickly fill up the cylinder and then be putting all the vacuum force on my glan.
Am I wrong for being a bit nervous about that?
My other concern is with a slight curve (only a couple hundred thou) I don’t think I could fit inside a 1.75” cylinder trying to go in erect.

Thanks for the input, just trying to get a bit better understand of Air pumping.

Michael

A 2.0 diameter will work for you. Use moderate pressure and heat when you start.

Yeah you need either lube or some other protection to the glans or it will rub against the wall with a curve. Though, it will at least inside the pump straighten out.

I think pumps should have a slight banana shape. But that would make it a custom made production.

If you have about $90, the LAPump elongated (oval) cylinder would be your best choice.

Cost isn’t an issue (can’t really put a price on this).

I have seen the elliptical tubes but don’t understand the advantage. How does an eliptical shape work better then a circular shape tube?

As was mentioned in another thread, that 15 degree tube looks interesting. Not a curve but as a guy that does stay tight against the belly when erect, this should help with some of the rub.

I would go with a 2.0 if I wanted girth as a goal in your case. If you’re interested in the EZ angle tube style made by pumptoys, give it a whirl. Their Velseal has such a nice, thick gasket that you’ll likely seal better anyway and the upward angle I’ve found indispensable. I do not use any other tubes. I have a 2.25” that’s served me well for quite some time now and a 2.5” waiting.

I never really understood air pumping, I only do it in the water.

Vacuum Pumping 101
Girth theory: Pumping vs. clamping
These threads explains better how pump works. On the second link, you will be able to find more advanced and scientific stuff.

This one is about the cylinder size:
Selecting Your Cylinder Size

Does it come with the seal or do you have to purchase that separately? I didn’t really see that specified in the description.

The way the “VelSeal cylinder looks is how it comes. Big silicone seal and all. The EZ angle is an option that must be specified. Usually $15-25 more.

The VelSeal gasket (silicone seal) makes pumping a truly comfortable experience. It fits any cylinder with a flanged edge and can be purchased separately for about $26.

Good stuff,

Thank you all for the information, I do appreciate it.

Mike03016, on this day, October 8, happy birthday. Have a great day.

From Holbeach UK

Wow, just seeing your very kind post.

Thank you very much,