Pressurebox Core - FAQ, User Guide and Troubleshooting
Here you’ll find frequently asked questions, guides, and tips for the Pressurebox Core series.
1. Before Use
When you receive your Pressurebox, open and close the lid a few times to get familiar with the threading.
2. Closing
Close the lid firmly, but avoid excessive force, as pressure containers can become harder to open over time.
For optimal airtightness, align the logo on the lid with the transparent window on the cylinder. For brand new containers, a slightly looser closing position (about 1–2 cm before this point) is typically better to ensure easier opening while still maintaining an airtight seal.
If you prioritize easier opening, you can remove the small O-ring on the cylinder, since the lid has its own seal. If you do this, close the lid slightly firmer than usual. It will still be easier to open while maintaining a good seal.
3. Easy-Open Customization
The Pressurebox features a dual-seal system. If you find the lid difficult to unscrew, you can customize the tension by removing the secondary O-ring located on the cylinder threads (see image).
Removing this loose O-ring is easy; simply use a flat-edged object to pull it out of its groove. The Pressurebox remains fully airtight without this secondary ring because the lid contains its own primary internal seal. This reduces friction and makes the box significantly easier to open. If you choose this option, simply close the lid slightly firmer than usual to ensure the primary seal is fully engaged.
4. Pumping
Pump your Pressurebox using a Schrader bike pump, such as the Pressurebox Pump.
Push the pump head down firmly onto the valve to ensure a proper connection so air can flow into the chamber. Monitor the pressure on the gauge (manometer) while pumping.
Recommended pressure: 20–30 PSI — higher pressure gives faster restoration but may make balls too hard if stored for long.
Never exceed 30 PSI.
5. Deflate
Remember to always press the deflate button on the lid before opening the box.
6. Opening
To open it easily, hold the cylinder against your chest with the bottom of your palm, using your full hand rather than your fingers, and rotate the cylinder and the lid in opposite directions (see image).
How-to-Guides and Solutions
Please try the steps below if your product is leaking air.
1. Ensure the lid is properly closed
Close the lid firmly, but do not use excessive force, as pressure containers can become harder to open over time.
Optimal airtightness is achieved when the logo on the lid aligns with the transparent window on the cylinder.
If you prefer easier opening, you can usually stop 1–2 cm before this point—the container will still be very airtight.
2. Make sure the valve cap is correctly positioned
Ensure that the valve cap is not pressing down on the inflation valve (A misaligned valve cap may press down on the deflate valve, causing air to release).
3. Check the threads
Make sure the threads on both the lid and the cylinder are clean and free from dirt or debris.
4. Reinstall the O-ring
Remove the black rubber O-ring located on the outside of the cylinder. Turn it around and place it back into its designated groove.
The O-ring is loose and easy to remove. Ensure it is seated correctly and evenly in the groove.
If you have grease available, you may apply a small amount to the O-ring before reinstalling it.
5. Check the deflate button
Ensure that the deflate button is not stuck in the open position by pressing it up and down several times, to make sure it moves freely.
If this still does not help, remove the lid, turn it upside down, and use a screwdriver or a similar non-sharp object to firmly press the valve located directly beneath the deflate button from underneath. This will push the deflate button upward.
This should ensure that the deflate valve is not stuck open.
For easier opening, avoid tightening the lid too hard when closing the box. If you still find it difficult to open, you can remove the O-ring on the cylinder and use the Pressurebox without it. The container should still remain airtight because the lid has its own seal, and it will be much easier to open.
If the lid has been closed too tightly and is difficult to open, try the following steps:
1. Make sure the box is fully deflated, and use the grip shown in our guide and in the information email you received.
2. If it still won’t open, try using a glove (thin skin gloves provide the best grip), a towel, or ask someone stronger to help.
3. If the lid remains stuck, gently tap around the lid threads with a spoon to reduce friction, then try opening it again.
4. Ask someone for help. One person should hold the lid firmly with both hands while the other twists the container.
5. If you are still unable to open the box, please contact us and we will be happy to help.
Situation: The balls are too hard
Since the pressure inside the Pressurebox is higher than the internal pressure of tennis and padel balls, the balls may become too hard if left in the box for an extended period and/or if too much pressure is applied.
This is easy to resolve: use lower pressure (for example, 20 PSI instead of 30 PSI) and/or open the box some time before playing and allow the balls to rest outside of the pressurized environment. The balls will gradually soften as the pressure equalizes.
Situation: The balls are not hard enough
If you want faster pressure restoration or firmer balls, pump up higher pressure, but never exceed 30 PSI.
If the balls are very soft or old to begin with, restoring pressure may take longer and you may need to start with lower pressure to avoid implosion of the balls. For best results, start with balls that still have some pressure and use the Pressurebox regularly between sessions to maintain optimal ball performance.
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Note: Only submit a warranty request if you have already tried the "How to Guides" at this page, or contacted support previously.