@pit I've got one of these- https://www.wiggle.co.uk/lifeline-digital-shock-pump
Any escaping air should just be be in the hose as the valve should have closed.
It works that way on the top valve, but the bottom one is super long and doesn't close as fast. Something to do with feeding both chambers at the same time. Any way my new 600 psi pump did the trick. Also my 15 year old pump had a 20psi accuracy.
@pit started
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@pit
I've got one of these-
https://www.wiggle.co.uk/lifeline-digital-shock-pump
Any escaping air should just be be in the hose as the valve should have closed.