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Penis Pumps are, in essence, vacuum devices.

As a general rule these mechanical vacuum devices cause an erection by creating a partial vacuum around the penis. Basic laws of physics try to equalize the pressure inside the penis with the pressure outside the penis. This causes blood to be drawn into the penis, engorging, expanding it, and making it larger.
The devices(pumps) have four components:
  • a plastic or glass cylinder, into which the penis is placed;
  • a pump (suction bulb, trigger pump), which draws air out of the cylinder;
  • an elastic seal(a donut or shaped o-ring), at the base of the cylinder which helps maintain the vacuum.
  • An elastic ring(cock ring, keeper) which is placed around the base of the penis to maintain the erection after the cylinder is removed as well as during intercourse. This ring maintains the erection by preventing blood from flowing back into the body (see figure 2).

    Figure 2: Illustration of a vacuum-constrictor device

    Figure 2. A vacuum-constrictor device causes an erection by creating a partial vacuum around the penis, which draws blood into the corpora cavernosa. Pictured here are 3 of the pump components: (a) a plastic cylinder, which covers the penis; (b) a pump, which draws air out of the cylinder; and (c) an elastic seal, which helps maintain the vacuum within the cylinder.



    We sell a wide variety of pumps.. ranging in size, style and price.

    Before you go and spend over $500 on a Post T vac system, consider spending a lot less on ANY one of our pumps.. no prescription needed.
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