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Losing vacuum pressure gradually. Is this normal?

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Originally Posted by dtwarren1942
I have used a Harbor Freight brake bleeder pump for over six years using five different cylinders and have not experienced a leak, yet.

Electric pumps are too expensive though. I’m gonna try sealing every nook and cranny I can find. What’s the best way to seal the male threaded valve that connects the hose and goes into the female threaded valve (cylinder)? The o-ring on the male threaded valve is too weak I think.

Originally Posted by dwp93

Electric pumps are too expensive though. I’m gonna try sealing every nook and cranny I can find. What’s the best way to seal the male threaded valve that connects the hose and goes into the female threaded valve (cylinder)? The o-ring on the male threaded valve is too weak I think.

Harbor Freight pump is a manual pump and appears to be the same pump LAPump sells for about $60. I paid $17 with a coupon from an automotive magazine plus $1.25 for the male coupler from McMaster and Karr.


Start 11/09 BPEL: 5.5", EG: 4.4"

Current. BPEL: 6:4", EG: 5.5"

Originally Posted by dwp93
I just test my system to see how much pressure I am losing. I removed the hose from the pump, and put my thumb over it for a few minutes, no pressure was lost. I then put the hose back on the pump, and put my thumb over the end of the hose for a minute, and it was gradually losing pressure. I’m surprised because I can’t see how it’s losing pressure from the hose. Both ends are tightened very securely, and can’t be tightened any further. How can you lose pressure from the hose? Do you have any explanation for this?

Looks like you narrowed it down to the hose. If the connections are tight, you probably have a small hole in your hose. No big deal, just replace it and see if you still have problems.

As someone said before, you will lose vacuum gradually in the cylinder as your penis expands. Nothing you can do about that. I actually like it because it gives a quantity to how much you are expanding.


Starting Stats: BPEL 5.5" EG 4.4" -- Current: BPEL 6.9" EG 4.95" -- Short Term Goal BPEL 7", EG 5.25" -- Ultimate Goal : BPEL 7.5" EG 5.75"

I had this problem about a month ago, had to buy a new pump. Went a bought a mityvac pump from Autozone and it works like a charm. Pumps wear out if they are the cheaper ones.

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