Tennis Ball Pressurizer – Converts Compatible Tennis Ball Container into a 30 psi Ball Pressurizer & Extends Ball Life (Pump & Container not Included in Standard and Standard Plus)

I play 3-4 days every week. Have been able to maintain good pressure using this. Balls can be pressured so the bounce in higher than new balls fresh out of a can. This is useful when playing temperature is less than 40 degrees.

This product works very well!

This product is excellent for maintaining the pressure of new balls. Does exactly what it is supposed to do. However, it does not add pressure back into already-flat balls. I assumed it would, but it doesn't, and can't. The reason is that when you put a flat ball in, and pressurize the can, the flat ball will squish--actually dent--until the pressure inside the ball is the same as the pressure in the can. If the ball were rigid, then air would go into the ball, but the ball of course isn't rigid so higher pressure air outside the ball just squishes it. Oh well. It's still quite useful to have it maintain the pressure of the balls.Note that you need a Penn or Dunlop ball can. Wilson and Babolat ball cans don't fit.

So admittedly the first unit I got for some reason did not hold pressure and I ended up doing an exchange - but the seller reached out and asked several questions that I believe was genuinely trying to understand how the product may have failed which I really appreciated (kudos to the team!).On the unit itself - it is very easy to use (make sure you use the right Penn canister) - and understand that this will not resurrect completely dead balls from the grave - but definitely keeps newer ones fresher and even may revive some slightly used ones to a better condition. What I like about this unit is that it has a color pressure gauge so at least you have an idea of what the inside pressure is. Some of the harder plastic ball pressurizers leave you guessing as to the internal pressure so that is cool.Overall, I really like the extender, and I will be using this every time I open a fresh can of balls to keep them going longer!

Can't hold pressure. Leaks at seal while inflating and never builds pressure.

It is very portable. I can put it in my tennis bag and take it with me to the tennis court.

Overall, I’m happy with it and it does work much better than the Gexco and Tourna twist style ball savers. Using a bike pump gives you a lot of control over the amount of pressure.Couple of tips:1. It is VERY finicky about the can because it relies on having a regular Penn Championship can with a perfect metal rim. You may need to try many cans before you find one that holds pressure. Dents and cans that are out of round will cause leaks.2. You can use this to repressurize completely dead balls but if you use too much pressure and the ball collapses it will never gain pressure. You have to take your time and pressurize until just before it collapses and leave it there for a week. Then add a little pressure and leave it there for a week etc.

Excellent to keep tennis balls fresh.