I thought I’d give this whole thing a try…
I bought the setup that TG recommended, but made a few changes to the tubing and fittings for a simpler and (somewhat) cheaper design. The first vacuum gauge I bought from Amazon was defective, so I sent it back and they sent me another one that works properly.
First few times I tried this, I think I was using too much vacuum. With TG’s suggestions, I backed off a little so the max pressure I get to now is around 20” hg. I do 2 sets of about 10 minutes each, with a short break in between to massage in some fresh blood and restore circulation. I don’t do a steady 20” hg. I’ll cover the vent hole briefly, let the gauge get to about 20” hg, and then back off. I do about 4 cycles a minute after I’ve become acclimated. I wrap the cylinder with a heating pad during the routine.
One of the cool things I noticed is that the high vacuum stretches my penis more in the tube - about a half an inch. I used to reach 8.5” at low pressures, but at high pressures, I get to 9”. That’s not growth or gains by any means, but it still is cool. At the end of a 20 minute session, I am tightly packing my 2x12 cylinder, the entire length of my penis. That never happened before either. I’d normally pack the bottom 4-5 inches, but not all the way. That’s pretty cool too.
I only do one or two PE4F sessions a week, on the weekends when my wife isn’t around. The rest of the time it is a little regular pumping with a manual pump, some light hanging, and an ADS in between.
Problems I’ve had with this setup:
1) my pump is noiser that I would like. If it was really quiet, I could use it when my wife was sleeping in another part of the house. Not a chance with this thing.
2) my pump leaks oil. A little pool of oil forms on the top of the pump. I have to clean it up very carefully or it will wreck the carpet.
3) the 1/8” vent hole is really too big. I’d suggest that others try 2 or 3 1/16” holes instead. You can control the pressure more easily that way. The 1/8” hole gives me less than 5” hg in the tube. That gives you only 2 choices: 5” hg pressure, or 30” hg pressure. It is nice to have some choices in between.
4) I think it is a good idea to protect the skin on your glans for high pressure pumping. Some microfoam tape, or a silicone cap, or both will offer some protection from blisters.
This is a different experience than regular pumping. Once I pack the cylinder completely, it feels more like hanging than pumping. You might like that, you might not.