happyandbob
Legend
I have a big box of dead tennis balls that I've been collecting to eventually ship out to https://www.recycleballs.org. I was looking at the balls the other day as I was dropping a new set in, and many of the balls are dead but the felt seems to be in decent shape.
I have a couple of the yellow tennis ball savers that I use now and then (they work meh) and thought I might be able to repressurize them if I can add more pressure to those yellow savers.
I bought a tire valve stem to install on it to see if it would hold more pressure ($9 for pack of 4)
grabbed some dead balls. this one is fuzzy but I wanted to make sure the ball was pretty dead.
drilled a 1/2" hole in the top of the saver
installed the valve
pumped it up to just under 30 psi
it bowed out the sides, top, and bottom -- it doesn't sit flat on the bottom anymore
The whole thing took 5 minutes. So far, I don't hear any audible leaking. I'll report back on how the balls look in a week.
I have a couple of the yellow tennis ball savers that I use now and then (they work meh) and thought I might be able to repressurize them if I can add more pressure to those yellow savers.
I bought a tire valve stem to install on it to see if it would hold more pressure ($9 for pack of 4)

grabbed some dead balls. this one is fuzzy but I wanted to make sure the ball was pretty dead.

drilled a 1/2" hole in the top of the saver

installed the valve

pumped it up to just under 30 psi

it bowed out the sides, top, and bottom -- it doesn't sit flat on the bottom anymore

The whole thing took 5 minutes. So far, I don't hear any audible leaking. I'll report back on how the balls look in a week.