For the people who asked

There is no such thing as a perfect vacuum. In the real world at least.

Why not?

I tried it, I used a rubber band on my shaft for 10-15 minutes inside the tube and it was alright. It helped me maintain a solid erection.

As far as banning NN, I don’t know. In the beginning he sounded alright but went cuckoo later with his “absolute” vacuum stuff. Didn’t he have to take elementary physics in high school?

I’m not surprised this guy is gone. States using 50hg and doesn’t even have a vac gauge. Yea, ok.. :BS:

BTW: In a reply to me he told me to put a cutoff inner-tube in my cylinder the full length of cylinder. Is this ok to do? I’m not sure about not being able to see what’s going on. This was before I saw him as a BS’er. Just wondering if others have done this with no problems.

Thank you Thunder for removing a bad element.

Wearing a ring , or even a sleeve , as N.N. had suggested , while pumping , even at lower pressures , is going to place more stress on the areas that are not covered , as the area that is covered will be held back by the sleeve . I think a ring is a little more dangerous , as it is going to cut deeply into the penis , unless it is a really soft , stretchable one . I would , as gprent recommended already , put the ring or sleeve on after removing your unit from the cylinder . And , sparky91 , I think that N.N. and school did not get along very well , if you check the grammar and spelling in a lot of his posts , especially the early ones , before he got jumped on , you can see what I mean . ” Mettle stayer “…. he , he , he .

- oh God. Just when I thought I had it figured out.

?

So. Pressure between 1-5 [may be 7], you want to push it even more? then 10-30?
Boy, I haven’t pumped yet but the sound of 10-30 HG is freaking me out!

And now the cock ring can go on your penis AFTER the pump and not during the pump?

I want to have a cockring to wear after pumping to keep the pumped effect.

The therp wrist wrap isn’t working.

Any suggestions for a cockring?

It has to be a cockring that I can wear on the base of my dick for long periodds. (8 hours)

Do not believe someone would sustain these high pressures. Once, I’ve reached 12” of Hg (according to the gauge, not my guess-work), and I can say it’s extremely high pressure for my unit.

So what does HG stand for anyway?

I’m not sure what you’re asking here?

HG or Hg as its properly written - Stands for Inches of Mercury
I am not sure why they do not use: PSI, Bar (which anyone in the scuba diving community will be used to) or Pascals as these are all more recognised units of pressure.

Hg seems to be a US thing

It is defined as the pressure exerted by a column of mercury of 1 inch in height at 0 °C at the standard acceleration of gravity.

1 inHg = 3386.389 pascals at 0 °C.

Inch of mercury - Wikipedia

Wikipedia strikes again

The Hg is one of those wonderful , quaint old units of measure that we here in America cling to , while the rest of the world has moved on , and adopted International Standards . Just like we are still using inches , feet , and miles to measure distance , when the rest of the world is metric . And we need two sets of tools , etc… to do anything . ” Hg is defined as the pressure exerted by a column of mercury of 1 inch in height at 0 °C at the standard acceleration of gravity.” Rolls right off the tongue , eh ? So H for height , g for gravity . As far as cock rings , you want something that goes on and off easily , and will accommodate a range of size . The jelly rings are nice , but a little slimy with lube involved . Snap on leather rings are nice , just watch the snap . There are also some lasso style rings that work well , but I find to be too thin . Try some wide , small diameter rubber bands , like you find on bunches on broccoli and the like .

That’s not quite right. Here in Russia we use the same unit in weather forecasts (atmospheric pressure) etc. The only difference is that here we use a metric system.

About time this bloke left.

Standard atmospheric pressure (1atm) = 101325 Pascals (N/m^2) = 1.01325 bar = 29.92 in Hg = 14.696 psi

Assuming you are in an environment at 1atm you can only produce a maximum vacuum pressure of 1 atm (which equals 29.9 inHg, 14.7 psi). It is therefore impossible to create a vacuum pressure of 50 inHg unless you go diving to at least 20ft of water and pump, or pump inside a compression chamber.