Cylinder purchase
Hi Mr Bulge. I think you will like pumping. Already, I have seen some benefit to it, even though my cylinder is not the ideal size. In my case, the "sealing off" at the opening by base girth and toward the valve end by penis head prevent uniform expansion of the whole shaft under vacuum. Still, I am getting a "pump" with my routine, which leaves me fuller and heavier. Following the sage counsel of folks like Avocet8, I pump short duration (5-10 minutes)at low vacuum pressure (4-6" Hg) followed by a jelk session. Then repeat.
I was advised to be very careful that the cylinder diameter was not too large, in order to avoid sucking a testicle into the tube. There is no chance of that, whatsoever, as my base girth seals off the tube. There is no room for anything to be sucked into the cylinder. Still, I agree that it is important not to have the opening of the tube much larger that your erect base girth. Some people’s penis head is the same size or smaller than their erect shaft. Mine is larger and mushrooms, so the back side of glans gets very tight (smashed) against the inner tube wall under vacuum. This is not ideal, at all.
To answer your question, I bought my cylinder from LA Pump. You can find them at https://www.lap-dist.com. They were not the cheapest, but I liked the flared base (for comfort and easier seal) and the the uniform cylinder diameter. Some cylinders, like those sold by Dr. Joel Kaplan, taper toward the valve. That would have really put the pinch on the old penis head (in my case, anyway).
One final thought. Don’t pay the huge mark-up on the pumps from the online stores. I bought a MightyVacII from a chain auto parts store in town for under $25. The same exact pump goes for $65-85 at various penis pumping sites. You will need to buy a male fitting to go inside the flexible tubing (connects to the cylinder). They run $8-10 from the penis pump places, but can be picked up for next to nothing from Lowe’s or Home Depot (etc.). The MightyVac allows for wet pumping, because it has a fluid catch-cup for draining brake lines and so forth. That prevents liquid from getting into your pump and screwing up the seals. Just fill the cylinder half-way or so with very warm water (if you want to try this), insert your erect penis and pump out the excess air and water.
Good luck to you! Hope you find pumping a useful, gain-producing experience!!
bigjack
I won’t be content until I’ve earned the name!