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Penis Pump Cylinders & Cock Expansion Tubes

When you are looking for more of a customized penis pump experience then reach for a modular pumping system with an expansion cylinder. These professional penis pump systems allow you to choose the type of hand pump you want to use along with the individual penis pump cylinder. There are a variety of penis pump parts available to fully customize to your liking.  When building an effective enlargement system selecting the best parts for your specific needs will help you maximize your results.

These types of systems typically sell the hand pump separately from the cylinders.  Modular penis pump systems use a unique quick disconnect air system which allows for easy and quick connecting and disconnecting of each of the parts. This gives you the freedom to change out the penis pump cylinders on the fly for the perfect fit (especially as you grow). 

Most of these systems have tubes that are designed for high-pressure usage, giving the user maximum results with minimum effort. As with all penis pump systems, using a silicone erection ring will allow for longer-lasting results. Don't forget your favorite lube to and penis pump donut seal Find your perfect modular pump system and enjoy harder bigger and longer-lasting erections. For sizing, continue reading below.

Penis Pump Cylinders & Cock Expansion Tubes FAQs

Penis pump cylinders are the tube portion of a penis pump.  This is the clear cylindrical part that you place your penis into when pumping.

Penis pump cylinders can be purchased individually to give you a more customized pump set up.

If you are unsure about how to use these pump cylinders, check out our entire penis pump guide which will help you get a better understanding.

These cylinders include a female quick disconnect fitting at the top of the cylinder. They are compatible with any hand pump or electric pump that has a male fitting at the end of the silicone tube. These fittings make it easy to switch out cylinders as you increase your size or needs.

Most standard penis pumps do not include the necessary quick disconnect hardware to use a modular cylinder. In order to add a stand alone cylinder, you will need to purchase a pump accessory kit that includes silicone tubing and the necessary quick disconnect fittings.

Most people purchase these types of modular pump cylinders because they take their pumping very seriously and look to maximize their results. You can add multiple cylinders to your collection without having to purchase a new hand pump.  This minimizes your expenses as you become more experienced.

These stand alone cylinders are generally of higher quality and used by professionals. 

Many doctors who recommend using penis pumps for erectile dysfunction will recommend one of these higher quality pumps to meet their patients' medical needs.

To complete your pump system, you will need the following items:

  • Hand pump or electrical vacuum pump - Typically comes with all air tubing but please check before purchasing (manual or electric)
  • Penis pump cylinder (Tube)
  • Male quick disconnect fitting that goes into the air tube
  • Female quick disconnect fitting that accepts the male fitting (These are usually included on the top of the cylinder

The fittings are how the pump and hose connect to the cylinder.

Penis pump cylinders are sized in relation to the length of your penis as well as the girth (girth is the circumference, or distance around, the penis) of your erect penis. 

To determine which tube size is right for you, measure your girth at the thickest point of your erect penis. The thickest point of the penis varies among men, and may or may not be at the head, middle, or base of your penis.

Measure by wrapping string or dressmaker tape around the base of the shaft of your cock when erect. Divide that length by 3.142 and the result will be the diameter of your cylinder. If you choose the next nearest diameter larger it allows for expansion.

To measure the length, use the same measuring tape and measure the length from where your penis meets your pelvis all the way to the end of your penis tip.  

 Penis Girth Circumference Penis Girth CM Pump Cylinder Size
Up to 5.25 Inches       13.3 cm 1.75 Inch Diameter
Up to 6 Inches       15.2 cm 2 Inch Diameter
Up to 6.75 Inches       17.1 cm  2.25 Inch Diameter
Up to 7.63 Inches       19.3 cm 2.25 Inch Diameter
Up to 8.38 Inch       21.2 cm 2.75 Inch Diameter

For length, most men will fall into the 9 inch cylinder length.  If you measure over 8 inches while erect, you should move into a 10 inch to 12 inch cylinder.

For a more comprehensive measuring guide, check out our penis pump calculator which will give you exact size and specs you need for your penis size.

If you plan on taking your pumping seriously then yes, modular pumps are a great way to get started. While they are more expensive than your standard pumps, these are designed to last you years. As you get more experienced at pumping and see greater results, you can quickly and easily change out your cylinder without having to buy a new hand pump.

These pumps look intimidating but they work the same as any other penis pump and offer even greater safety benefits.  To read more on penis pumps, check out our full penis pump FAQ.


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