My Tennis Ball Pressurizers

WilsonPlayer101

Professional
I know this has been discussed in previous threads but this isn't a question or a research post but just showing my ball pressurizers if any of you are interested in making one and/or have any questions about how to make them.

My first pressurizer was made of a white GE water filter. It works quite well. Took trial and error but I got it working. I made another one from a clear purple water filter and it works. I prefer the clear so I could see if the ball(s) collapse or not. I have two because if I open a new can of balls and play I can put them in one and pressurize up to about 35 PSI and let it pressurize for two weeks. Then play the next week and repeat the process. The first pressurizer when two weeks is done is opened and I play which means the second pressurizer has been pressurizing for one week and the cycle continues. If my friend and I get to go thru a new can about three times we are happy. 1st use is opening the new can then usage two and three are after we pressurize them. We may get more cycles but remember, the felt must still be good otherwise you don't get much efficiency out of the pressurizer.

Well, I was curious about the Corny Kegs for a couple years and I had about 40 tennis balls in a bag and thought I should make a Keg. I think a Keg is overkill for me because unlike many of you I don't play as much as you. I play once a week, we warm up, play a set then goodbye, go our respective ways. Many of you live on the court, hours a day and many days a week but for me life happens and I don't have that time. When I was younger I played a lot more. That said I just wanted to make a Keg and see how it goes. I think my two water filter pressurizers are enough for my uses but I wanted to make the Keg.

I didn't want to spend a lot of money so I bought two used Corny Kegs. $20 each. It took a lot of trial and error. Some say these are easy to make and that is true except sometimes if you buy used they leak and you need to refit with new parts and such and there is troubleshooting involved. Buying used from a company that specializes in selling new and refurbished Kegs is fine but using from buying from a private party it is hit and miss. Both of mine ended up leaking. I fixed one and the other one is still leaking but I think if I troubleshoot I can get it to work. In fact I even emailed a local Coke bottling plant near me and asked if they would sell me surplus Corny Kegs if they had some that were working but had too many and want to sell a couple. There is a Coke bottling facility about 15 miles from me in Downey, CA. Of course they never replied to me. It's Reyes Coca-Cola Bottling. What never asking if they would sell me a couple Kegs, huh?

One I used the Ball Lock disconnects and works but the second one I got smart and skipped those and got brass fittings and made something to screw on to the post and inflate that way.

I'll give more specifics if any of you are making one and have questions. I'll post pics in following posts.



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WilsonPlayer101

Professional
Looks like I can't post pics. I thought I could just upload from my computer but it looks like they have to be hosted to a site first then the link posted here to load a picture. You used to be able to just upload from a file on the computer. Too much trouble hosting to a website then do the link.

Photobucket isn't free anymore, therefore I have no account.
Anyway if you have any questions about making a Keg I'll answer any questions and help you avoid any of the mistakes I made.
 

mad dog1

G.O.A.T.
Looks like I can't post pics. I thought I could just upload from my computer but it looks like they have to be hosted to a site first then the link posted here to load a picture. You used to be able to just upload from a file on the computer. Too much trouble hosting to a website then do the link.

Photobucket isn't free anymore, therefore I have no account.
Anyway if you have any questions about making a Keg I'll answer any questions and help you avoid any of the mistakes I made.
Upload photos to Imgur and attach the links here.
 

WilsonPlayer101

Professional
Water Filter Pressurizer. Works well and for me that is all I need.


Zlns89w.jpg
 
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WilsonPlayer101

Professional
The one I am by passing the Ball Lock and made an inflation route with brass fittings, a Schrader Valve and a pressure gauge. It leaks from the Ball Lock that is not being used. I bought a brass cap to cap it off but I bought the wrong size. Hopefully I can get the right one, install and keep it from leaking. The one in previous post does not leak.

25VDJ8X.jpg
 

WilsonPlayer101

Professional
If you are not able to make one yourself or don't want to you can buy one of these already made. Cost a lot more but if you use a lot of balls then maybe in the long run it will be worth it and save you from headache if your initial creation leaks.


pressure-refresher-product-4_1bc91995-ac28-44ef-9c5f-c51f5748eeab.jpg
 

jiangrm

New User
Same here. I chose not to mess with the ball lock but drilled a hole on the lid, put a rubber valve stems, and it's done
 

ey039524

Hall of Fame
I was searching for corny kegs online and most go for around $70-80. I found refurbished 5 gal kegs from Beverage Elements for half that and $20 shipping, so $50-something shipped.
 

tennis3

Hall of Fame
If you are not able to make one yourself or don't want to you can buy one of these already made. Cost a lot more but if you use a lot of balls then maybe in the long run it will be worth it and save you from headache if your initial creation leaks.


pressure-refresher-product-4_1bc91995-ac28-44ef-9c5f-c51f5748eeab.jpg
I bought one of these that holds 60 balls and it works great. Yes, it cost $200. But I figured I couldn't make one myself for much less than $100 anyway. And in the end, I didn't really want something I made myself. I suck at things like this. Better to pay double and get one that works. I don't see having any issues with this ever.

I really don't reuse balls much for actual play, but it's nice to have some around for serve practice or even a ball machine. I normally use Tretorn pressureless, but I like to have these refurbished balls around.
 

WilsonPlayer101

Professional
I bought one of these that holds 60 balls and it works great. Yes, it cost $200. But I figured I couldn't make one myself for much less than $100 anyway. And in the end, I didn't really want something I made myself. I suck at things like this. Better to pay double and get one that works. I don't see having any issues with this ever.

I really don't reuse balls much for actual play, but it's nice to have some around for serve practice or even a ball machine. I normally use Tretorn pressureless, but I like to have these refurbished balls around.
I agree, it's worth it to buy a pre-made one. If one builds one then great but if one buys one made already then great too. Saves you the headache of buying many separate parts and things going wrong.
 

WilsonPlayer101

Professional
I'll just give details on how to make this.

You can get a clear or an opaque water filter housing. Advantage of clear is you can see if your balls (no pun, LOL) are week and collapse under pressure.

Get a housing such as this. This is opaque but you may get a clear one if you prefer -


A quarter inch Shrader valve -


Pressure gauge like this -


Plumbers tape to help seal the connection when you screw in the tire valve and the pressure gauge. This helps keep it from leaking air.


On the cap up on the top of the housing there are two openings which you can't see but you can see the profile of the openings. This one under specs say it's 1/4 inch which should mean the pressure gauge and the tire valve should screw in without any adapters. For plumbing 1/4 inch water pipes go into the holes but we will screw in the tire valve and the pressure gauge. Both the housings I have are 1/2 inch access for 1/2 inch pipes so I needed an adapter for it.

Something like this. This is a ten pack but you can fine them sold individually -


When you make this it will be trial and error, trial by fire. It may leak air and require tightening the parts, adding more plumbers tape and other things. It can be frustrating but worth it once you get it fixed and it works. I suggest pressurizing at 34 PSI for 2 weeks and the balls will usually be really bouncy and lively. I bought the lowest priced Penn tennis balls at Walmart and right out of the can they were not very lively, but I put them in the pressurizer and they were bouncy and lively. Well worth it. This is good as long as the felt is still good on the tennis balls.
 
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WilsonPlayer101

Professional
Make sure you get one with a wrench which wraps around the housing so you can open it easier than with your bare hands. Also get one with a release valve button so you can let the air out before opening it for safety reasons. Here is one that fits the bill but the ports are 3/4 inch but you can get the adapter so your 1/4 tire valve and pressure gauge can screw into it. This is clear also.

That's it. This is how you make it. Any questions let me know. I suggest you make two for every day you play per week. What I mean is I play once a week so I open a new can and play, pressurize balls for two weeks so in two weeks I use the balls. The next week while the first set are pressurizing I open a new cann and play then pressurize it for two weeks later.

 

WilsonPlayer101

Professional
It's more economical to have a beer corny keg pressurizer if you have a lot of tennis balls BUT it's more practical if you play once a week with three tennis balls per session to have water filter pressurizers. For a few balls the corny keg is overkill if you ask me.
 

ey039524

Hall of Fame
If you're only pressurizing 3 balls, why not buy the plastic one for <$20?

We bought a 5 gal corny keg for our ball machine balls.
 

WilsonPlayer101

Professional
Those pressurize only up to 14 PSI the amount tennis balls in unopened tennis ball cans are pressurized at. I had these twice and they do nothing. When tennis balls are made I think they are pressurized to about 24 PSI and then placed in the can at 14 PSI. You need to make a ball pressurizer to go up to about34/35 to revive balls.
 

devoker

Rookie
This guy says they use nonstandard threading on the ports. What adapter did you use to connect the gauge? Did you use a pin lock disconnect for the pressure port? If yes how did you connect it to a schrader valve?
 
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WilsonPlayer101

Professional
This guy says they use nonstandard threading on the ports. What adapter did you use to connect the gauge? Did you use a pin lock disconnect for the pressure port? If yes how did you connect it to a schrader valve?
One of the kegs is a pin lock and one a ball lock. The one in the video I think is a different maker than a Corny Keg and has a weird nonstandard threading as you mentioned. If you get a real Corny Keg brand threading is normal and I had no problem buying Lowe's and Home Depot parts and the gauge from Amazon. Don't buy the one in the video. Get the real Corny Keg to avoid the threading headache.
 

travlerajm

Talk Tennis Guru
Those pressurize only up to 14 PSI the amount tennis balls in unopened tennis ball cans are pressurized at. I had these twice and they do nothing. When tennis balls are made I think they are pressurized to about 24 PSI and then placed in the can at 14 PSI. You need to make a ball pressurizer to go up to about34/35 to revive balls.
fill the extra void volume with 7” strips of bungee cord wrapped around into circles. One at base, two between balls, for 6 total. You can get plenty of pressure. You need to open and close multiple times to vent because the pressure outside the balls drops from leakage into the balls.
 

tennis3

Hall of Fame
Just fill enough of the extra volume with spacer material and they can.
Yup, that's the "hack". But the real problem is, you can't "fine tune" the pressure. So the ball will almost always be too bouncy or not bouncy enough. Which makes them pretty worthless.

With the Korny Keg, you can pressurize to an exact PSI. And once you figure out by trial and error what works best, you can pressurize balls pretty exactly.
 

travlerajm

Talk Tennis Guru
fill the extra void volume with 7” strips of bungee cord wrapped around into circles. One at base, two between balls, for 6 total. You can get plenty of pressure. You need to open and close multiple times to vent because the pressure outside the balls drops from leakage into the balls.
Sometimes I forgot to use it, but I used to be able to recharge a half-dead set of balls to decent pressure during my 20 minute car ride to the courts, by venting/recharging the bungee-stuffed ball can at each stoplight.
 

travlerajm

Talk Tennis Guru
Yup, that's the "hack". But the real problem is, you can't "fine tune" the pressure. So the ball will almost always be too bouncy or not bouncy enough. Which makes them pretty worthless.

With the Korny Keg, you can pressurize to an exact PSI. And once you figure out by trial and error what works best, you can pressurize balls pretty exactly.
I got pretty good at knowing how many ventings it takes to reach the right pressure.
 

WilsonPlayer101

Professional
I saw somewhere on either TT or some other place where someone did get one of those "tennis ball saver" cans and did modify it to have a valve to pump it up and a pressure gauge. That is something to consider. Food for thought.
 

travlerajm

Talk Tennis Guru
Are you saving any money by doing this?
I was using my bungee-stuffed can regularly a few years ago when I was playing 4-5x a week in 2020 pandemic year.

Since I could rejuvenate the ball pressure easily, the ball life was limited by the felt wearing off. My hitting buddy and I wore the felt down until the balls were almost bald, but boy did those balding balls bounce well. :)
 

WilsonPlayer101

Professional
Are you saving any money by doing this?
I believe so. If you use a can of balls initially and re-pressurize them say 3 times then you are buying a can once and not buying three times more because you are reusing them and they are pumped up enough to use. Then over time the pressurizer is paid for and in the future it doesn't cost a thing and you are buying less cans of tennis balls. For some people it's not worth the effort but to me I like the effort and getting more out of the tennis balls for the money I paid for them.
 

happyandbob

Legend
I saw somewhere on either TT or some other place where someone did get one of those "tennis ball saver" cans and did modify it to have a valve to pump it up and a pressure gauge. That is something to consider. Food for thought.

I still use the modified Gexco savers, but have largely switched to these: https://www.amazon.com/BALL-RESCUER-Containers-Pressurizer-pressurize/dp/B074PQLTXW

They work great and are way lighter to carry around
 

Ronaldo

Bionic Poster

I still use the modified Gexco savers, but have largely switched to these: https://www.amazon.com/BALL-RESCUER-Containers-Pressurizer-pressurize/dp/B074PQLTXW

They work great and are way lighter to carry around
Good idea. Carrying that corny keg was awkward. Opening that seal.........................priceless!
 

travlerajm

Talk Tennis Guru
One detail I should mention about using multiple vestings with a bungee-stuffed 3-ball saver to quickly recharge balls:

With each subsequent venting, the hiss of the vacuum release gets less and less noticeable as you approach the fully rejuvenated ball pressure, because there is less and less extra void volume in the can each time. This gives you a qualitative way to know how “cooked” the balls are without having to fully open the container and take the balls and bungee fillers out of the oven each time to check.
 

ey039524

Hall of Fame
Who else here is going to make a ball pressurizer? Which one? Corny Keg or Water Filter Housing?
I'm making a 5 gal corny keg to hold ball machine balls. Used to have triniti pros, but they're too lively, so don't really approximate normal balls.

Just bought a couple valves off Amazon to hook up to my air compressor or bicycle pump and a pressure gauge I already had. Total cost was under $70.
 

WilsonPlayer101

Professional
I don't have this kind but some people use this kind but to pressurize the Corny Keg it will be sort of slow but who needs to go fast anyway? Then when not in use keep in your car in case you need to use it while out driving -

 

mixtape

Professional
I might try the water filter housing. I have a 20" water filter housing that was about to be tossed. So, is there a difference if you use regular air or CO2?
 
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