Pumping no effect

I’m using a rechargable vacuum pump from china. The first setting is -30kPa, which equates to 8.8hg. At the second setting -40kPa (11.8hg) I get bruising. The next two setting are 45kPa (13.2hg) and 50kPa(14.7hg).

One trick I use, is to put a 3 once disposable solo cup inside the tube, so as I slide up the inside of the tube, the head is in the cup, so the cup rubs against the sidewall and not my skin. The cups are disposable or easily wash and keeps the tube clean, not that it matters that much as the cup pretty much prevents the penis from even touching the tube.

I also use a double doughnut setup, so I can get a good seal without shaving or excess lube and Vaseline to form a seal. I used to spend 20 minutes trying to get a good seal and all of me above the seal, but now it is no problem at all. The inner doughnut is semi rigid, while the outer one is stretchy, they both have about a 1” opening.

I recommend to use beurer hk25.
Good size for pumps. Auto stop at 1.5hours.

After 1.5hours I understand time to stop pe today :) ))

The first expansion noticed in the tube is almost always just a super erection, same thing that happens when you put on a cockring. The penis is filled with more blood during the erection. This expansion varies depending on your original erection quality. If you are at 70 % EQ you will instantly see a big expansion when slipping on a tight cockring or pumping up to 100 %. If you already are at 100 EQ that expansion will be less of course. The elasticity of your penis will then decide how much expansion you will see. Some guys need to pump allot more then others before they see an expansion beyond 100 % erection, you might be one of them. If you pump with water and find it difficult so see if you get any temporary gains maybe you should get an air pump.

You said that your penis gets darker but not bigger. That’s a sign that you are already at 100 % erection quality and therefore you don’t see an expansion immediately.

When I get hard it is not at a 100 % erection so when I put on a cockring or pump it gets larger right away. I can also just grip around my dick and it gets thicker and harder. An expansion for me is easy with the pump but I would prefer always having a 100% erection and not seeing that expansion so easy in the tube.