I never heard of putting water IN a tube to detect leaks, but certainly, pumpnig a tube up til its a bit fatter than normal, and using soapy water to find leaks is common practice. its nowhere near 10psi, though... more like 2-3 PSI.


first, tho, I'd do the spittle over the valve stem while its still on the bike, thats the most common source of a slow leak.