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  • For reference - 2 litre PET bottles explode at about 110psi when the valve is in the cap. As the others said, it’s LOUD when it goes!

  • You can increase the psi and noise/pain level by wrapping in duct tape.

    You know...if that's what floats your boat.

  • That’s actually a pretty good point - which I hadn’t considered. And Honda tape is way stronger than gaffer tape. I think you’ve just given me an idea... [160+psi water rocket]

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