Originally Posted by
jadocs
No need, the leak is not the result of a puncture, it just slowly deflates which means his tire is not sealing properly. Primary culprits is losing air around the spokes (which means poor tape job or tape is old and no longer doing the job) or around the valve (if the valve is not seating right it can be either operator error, or the tape is in such condition that it prevents it from seating properly).
I would still put the wheel in a tub of water. It does not matter whether it is a sealing issue or a puncture, because there is always the outside chance that it is a different issue, such as a tire manufacturing error, a crack in the wheel and so forth. Once the tire is off, the problem often becomes invisible.
trev