Pressurebox Pro - FAQ, User Guide and Troubleshooting

1. Check the cylinder threads first. Open the box, make sure the threads are clean, and look at the groove on the threads.
   
   If the groove is empty (all new units): leave it empty.
   
   If there is a small black rubber ring in the groove (older units): lift it out from the groove. It is loose — if it is hard, use a flat-edged screwdriver or similar.
   
   Either way you end up with bare threads — airtight, and a noticeably easier lid to open. That is the setup step 2 assumes.
2. Close the lid firmly. Make sure the power switch is ON. Close the lid until the logo lines up with the transparent part of the cylinder. If it still leaks, close firmer than that point — that is fine, as long as you can still open it easily (just check that there is no o-ring on the cylinder threads before you close harder).
3. Test the deflate button. Press it several times to be sure it is not stuck open.
4. Adjust the primary seal. If none of the above makes it airtight, the seal inside the lid needs attention.
   
   Find it in the groove inside the lid. It sits loosely and blends into the material, so it is easy to miss. Pry it out with a screwdriver or knife tip.
   
   Wash it in hot water, press it back into its groove evenly, then open and close the lid firmly three times and test again.
   
   Only if it is still not airtight, apply a very thin layer of petroleum jelly or neutral grease to the seal.
   
   Full version with photos: Adjusting the O-ring for Pressurebox Pro

1. Use the relay method. Let the unit cool down. Put balls inside — do not test on an empty box. Run normal (green) mode first and let it reach pressure and stop. Only then hold the mode button for 3 seconds to switch to blue. Mode switching only works while the power switch is on.
2. Make sure it is off the charger. All programs pause while charging — that is deliberate, for battery health. After charging, switch the power off and then on again.
3. Full recharge to reset. Charge until all four lights stop flashing, disconnect, then run the relay method once more.

1. Use the original cable from the box. Not every USB-C cable works with the Pro. A cable that charges your phone does not rule this out. This is by far the most common cause.
2. Unplug it before you test it. The Pressurebox does not run while the charging cable is connected — all programs pause during charging, by design. A box that seems completely dead on the charger can be working perfectly. Disconnect, then press the power switch off and on again before you judge it.
3. Charge fully to reset. Charge until all four indicator lights stop flashing, then disconnect and switch it on.

1. Take it off the charger. All programs pause while charging. After charging you have to press the power switch off and then on again to reactivate it.
2. Check the switch and charge fully. The side switch has to be ON. Charge fully with the original cable until all four lights stop flashing.
3. Run it with balls inside. Put balls in the box and run normal (green) mode. If you have already tried several times in a row, let it cool down first.

Getting it open

1. Deflate first. Press the deflate button.
2. Chest grip. Hold the box against your chest and twist the lid and cylinder in opposite directions, using your whole hand rather than your fingers. Never point the lid towards your face.
3. Improve your grip. Rubber gloves or a towel. Take the silicone sleeve off the cylinder.
4. Tap the threads. Tap gently around the lid and cylinder threads with a spoon to release the friction.
5. Two people. One holds the lid, the other twists the cylinder.

So it does not happen again

If your unit has a secondary sealing ring on the cylinder threads, take it out. It is the main reason a lid becomes hard to open. The box stays fully airtight without it, because the primary seal that does the work sits inside the lid — the units we ship today have bare threads for exactly this reason. Close the lid firmer than before and it will seal just as well.

1. Check the power switch. The side switch has to be ON for the compressor to maintain pressure. This is the single most common reason for no result. It also has to be off the charger — all programs pause while the cable is connected.
2. Use high pressure mode. Hold the mode button for 3 seconds to switch to blue mode for faster restoration.
3. Run the test properly. Buy new balls next time you play, just once. Play with them, then store them in the Pressurebox in high pressure mode. Compare against fresh balls after a week — it takes days, not hours.
4. Completely flat balls cannot be fully restored. Start with balls that still have some pressure left.