How to Use a Penis Pump, Step by Step

What You Need Before Your First Session

A penis pump, also called a vacuum pump or vacuum erection device, has three parts. A clear cylinder that goes over the penis, a pump that pulls the air out, and a seal at the base. The pump creates negative pressure, a vacuum, inside the cylinder. That draws blood into the penile tissue, so the penis fills up and gets hard. Get these parts right and pumping is easy and comfortable.

• A pump with a pressure gauge. A screen or a dial that shows inHg, cmHg or kPa.
• The right cylinder. Wide enough for your girth, long enough for your length.
• A soft pad or sleeve. It seals the base and keeps your testicles out.
• Water-based lube. A thin layer on the base and the pad.
• A timer. Most electric pumps have one built in.
• A towel and 20 quiet minutes.

Pick the Right Cylinder Size

The cylinder size matters more than the pump. Too narrow and you rub against the walls and blister. Too wide and the pump pulls in skin, or even a testicle, and you swell more at the base. Too short and the head presses on the end.

To find your shaft width, measure your erect girth around the middle and divide it by 3.14. Then pick the cylinder just above that. Here are the sizes our cylinder sizing calculator picks for common girths.

Epic cylinders come in 7 widths from 1.5 to 2.87 inches. The typical man in our app starts at a 5.0 inch erect girth, which fits a 1.75 inch cylinder.

Snug cylinders favor length and wider ones favor girth, our coaches say. When you start to fill the cylinder wall to wall, it is time to size up.

The first day I pack a tube is the last day I use it. Means it’s time to size up

Chaswood, coach in our Discord

Use a Pump With a Gauge

Pressure is the one setting that can hurt you. Without a gauge, you are guessing. Our coaches will not even talk about a pump that has no gauge. A digital screen is easiest to read, and a smart pump can hold the pressure steady for you.

We don’t promote pumps here without a pressure gauge

Chez, coach in our Discord

Lube, a Soft Pad and Trimmed Hair

Use a water-based lubricant. Petroleum jelly sticks inside the cylinder and is hard to clean. A thin layer on the base of the shaft and on the pad is enough. A soft silicone pad spreads the pressure, so you do not get the red ring at the base that hard plastic leaves. Trim the hair at the base short, so it does not break the seal or get pulled.

How Much Pressure Should You Use?

Start low. Use 3 to 5 inHg for your first weeks, and build up slowly over months. The typical man in our app settles around 7 inHg. Our coaches treat 10 inHg as the upper limit.

10hg is often what we tell people is the upper limit

Chez, coach in our Discord

inHg, kPa and cmHg Explained

Pumps show vacuum pressure in different units, and mixing them up is a common mistake. Inches of mercury (inHg) is what our coaches use. 1 inHg is about 3.4 kPa and 2.5 cmHg. So 8 cmHg is light, but 8 inHg is a strong pull. Check which unit your screen shows before you start. On the Epic Pump you can switch units on the screen and in the app.

What It Should Feel Like

Our coach Chez puts it simply. It should feel uncomfortable but not painful. If you feel pain or discomfort beyond a strong pull, lower the pressure. You will feel a strong pull and the shaft filling up, and the skin may go a bit red. Pain, numbness, tingling, a cold head or a blue or purple color are signs to let the air out right away.

What Pressure Men Really Use

In our app, the typical man pumped at 5.9 inHg in his first week and 7.1 inHg by week 13. After that, pressure stays about flat. Across all 94,005 pressure readings, 40% were under 6 inHg, 28% were 6 to 9 and 32% were 9 to 12. Almost nobody logs more than 12.

More Pressure Did Not Mean More Girth

We split 375 men who measured their girth months apart by the pressure they usually pumped at. Here is the share in each group who measured thicker than when they started.

Share who gained any erect girth between their first and latest measurement, 2 or more months apart. Men with 5+ hours and 8+ days of pumping, with pressure logged. Typical gain: +0.14" at 5 to 7 inHg, +0.08" at 11 inHg or more. Self-reported, not a clinical trial. Results vary.

The men at 5 to 7 inHg did as well as the men who pumped much harder. Our coaches say higher pressure mostly buys more swelling, and one of them found it on himself.

More than 9, for me, only causes more edema. Not more expansion.

Chaswood, coach in our Discord

How Often Should You Pump?

Start with 2 to 3 days per week, with a rest day in between. Once that feels easy, you can go up to 3 to 5 days a week, as long as your erections stay strong. Think of it like any exercise routine. You grow on the rest days.

2 to 3 Days a Week Was the Sweet Spot

Here are the same men grouped by how many days a week they pumped, with the share who gained girth.

Share who gained any erect girth between two measurements 2 or more months apart. The small text shows the share who measured thinner. Only 13 men pumped 5 or more days a week, too few to show. Self-reported. Results vary.

Men who pumped 2 to 3.5 days a week had the highest share who gained girth and the lowest share who lost it. Among men who kept going for 3 months or more with 20+ pump hours, the pattern held. 78% of those pumping 2 to 3.5 days a week gained girth, against 64% of those pumping less. The typical regular pumper in our app pumps 1.7 days a week.

Check Your Morning Erection

Your morning erection is the best guide to how much is too much. If you wake up and your erection is weaker than usual, your penis is tired. Take a day off and come back at a lower pressure. Baseem gives every new pumper this rule, and it works for extenders too.

Is There a Best Time of Day?

No. Of 3,560 recent sessions in our app with a local time, 28% started in the morning, 23% in the afternoon, 27% in the evening and 22% late at night. Pick the time you can keep. Many men pump in the shower in the morning, or after their extender session at night.

Penis Pump Routine for Beginners, Week by Week

A simple plan built on what our coaches teach and what our app data shows. Start slow, build the habit, then add time and pressure.

If anything hurts, stay at the same step for longer. You do not have to reach the top pressure to gain. In our app, men at 5 to 7 inHg did as well as men who pumped harder.

A Weekly Plan With a Penis Extender

74% of men who pump in our app also use an extender. The extender builds length and the pump builds girth, so they work well together. Here is a simple week that fits both.

That is 5 extender days and 3 pump days a week. See how long to wear a penis extender to build up your extender hours.

Pump Before or After Your Extender?

Pump after. Our coaches give three reasons. A swollen head is more likely to blister in the extender cup. Swelling loosens your tape as it goes down. And some men no longer fit the cup after pumping. If you also wear an all day stretcher, the order is extender, then stretcher, then pump.

In our app, 78% of days with both put the pump after the extender. The order did not change the result. Men who mostly pumped after extending gained +0.12" of girth in a typical case, the same as men who pumped first. So if pumping first is more comfortable for you, that is fine. Just rest in between.

How to Use a Penis Pump for ED

Penis pumps are a standard treatment for erectile dysfunction (ED). In the US, the FDA classes vacuum pumps and constriction rings as Class II devices for getting and keeping an erection (21 CFR 876.5020). Doctors suggest them to men who cannot take ED medication, or who want an ED treatment without pills. A pump can help you achieve an erection, and a ring helps you maintain the erection for sexual activity. For sex, the steps are the same until the end.

1. Pump to a full erection, slowly, the same way as above.
2. While the pressure is still on, slide a constriction ring from the cylinder onto the base of your penis.
3. Release the pressure and take the cylinder off. The ring holds the blood in.
4. Take the ring off within 30 minutes. Never sleep in it.

Using a Constriction Ring Safely

The constriction ring, also called a cock ring or tension ring, is what keeps you hard, so it is also the part that needs care. Use a ring made for pumps, in the right size, and never more than 30 minutes. A ring that is too tight hurts and can bruise. The penis can feel cool and look a bit blue with a ring on, and ejaculation can feel different. Remove it right away if it hurts or your penis turns numb. For enlargement training, do not use a ring at all.

After Prostate Surgery

After prostate cancer treatment, and a radical prostatectomy in particular, many men lose their natural erections at night for months, and the penis can shrink. Daily pumping is used in penile rehabilitation to keep blood flowing to the penile tissue, which protects erectile function, penis health and penis size. As the rehab expert in that interview with Baseem put it, think of the pump as a replacement for the night erections you are missing. Talk to your urologist about when to start.

What the Studies Say

Most research on vacuum devices is about ED and surgery. Short daily sessions, usually 10 to 15 minutes, helped men keep their length. In one more study, only 1 in 36 men who pumped on most days for 90 days after surgery lost 1 cm or more, against 48% in earlier studies (Dalkin 2007).

For penis enlargement in men with a normal penis size, the research is thin. A small study of men who pumped 20 minutes three times a week for 6 months found no real change in length (Aghamir 2006), and a 2025 expert review says the same (Wang 2025). Girth has barely been studied. That is why we look at our own app data, where steady pumpers gain girth over months.

When Will You See Results?

Right after a session you will look and feel bigger. That swelling fades within hours. Harder, fuller erections usually come within a few weeks. Lasting girth takes months of steady sessions.

• Right after. Fuller and heavier for a few hours. That is blood and fluid, not growth. Never measure now.
• The first weeks. Many men notice stronger morning erections and better feeling. One verified buyer wrote, "After the first 2 weeks I wake up with morning wood bigger and thicker than I have had in many years."
• Month 3 and on. Measured girth starts to move. In our app, the typical pumper had added about 0.20 inches of girth by month 12, and the top 10% about 0.63 inches or more.
• 50 hours and up. 72% of men who logged 50 or more hours of pumping measured thicker, and 48% gained a quarter inch or more.

Men who message us after 12 to 16 months of pumping and extending report an average gain of 1.6 inches, length and girth combined, and often more when they stay consistent. In our app, the top 10% of men who did both for a year gained 1.6 inches or more combined.

Girth goes all the way around, so a small number in inches is a big change you can see and feel. See all the month by month numbers in our best penis pumps guide.

What Our Members Report

We read every girth update in our Discord where a member posted his own before and after numbers over 2 months or more. Across 16 men, the typical gain was about half an inch of girth (0.48 inches) over about 8 months, and half of them reported half an inch or more. Almost all of them pumped as part of a bigger routine, with an extender or hanging. It is a small group that chose to post, so treat it as a story, not a promise.

One coach adds a warning that every new pumper needs. Edema can make you think you gained, but it is temporary. Measure on a rest day, at the same time of day, with the same tape.

How to Clean and Store Your Penis Pump

• After every session. Wash the cylinder and soft pad with mild soap and warm water. Rinse well.
• Dry it fully. Let the parts air dry before you put them away, so nothing grows inside.
• Keep the motor dry. Only a pump made for water, like the Epic Hydro, can go in water. Wipe an air-only pump head with a damp cloth.
• No petroleum jelly. It sticks inside the cylinder and is hard to wash out. Use water-based lube.
• Charge it. The Epic Pump charges with USB-C, and one charge lasts for many sessions.
• Store it clean and dry. The box keeps the parts together.

How to Use a Penis Pump FAQ