Originally Posted by chuggs
In that case...you've probably got a very small leak. Unless there was a significant change in barometric pressure...there is a tiny leak somewhere...
Hope it's easy to find...
Interesting. The C02 tank is in the basement, but there has been a few summer storms running through. Either way, I'll figure it out.
Maybe it's best to perform the test with all the check valves closed on the manifold. At least then I can eliminate a few other points from the equation.