In article ,
Lobster writes:
Ian Stirling wrote:
Air goes through holes much, much easier than water, and will escape
hundreds of times faster than if filled by water.

Is it just about speed? Or is it likely that a system could be
watertight - ie perfectly serviceable in practice - but not actually
100% airtight?

If you get it airtight, it will certainly be watertight.

It should be airtight in any case, otherwise air leaks
in (even when the water pressure is much higher than air
pressure) and causes bubbles which can make a noise, and
use up the inhibitor faster, possibly resulting in
corrosion starting sooner than you's expect.

--
Andrew Gabriel