Originally Posted by pegasus1457
This is NOT a small leak. With a pressure drop like that there have to be bubbles in a soapy water test. Try submersing the entire tank in a bucket of water. If it is the tank you will see bubbles.
I thought about that, but it is a steel tank (and also it is pretty darn big - I don't have a bucket big enough for it). May be a tub would work?