Originally Posted by Mich48041
A 24 hour test is not necessary. The pressure will fluctuate as atmospheric pressure changes over time. That change might lead one to believe there is a leak when there is none.
Which is why the KAI recommends a procedure of using a soap bubble test.
If you already have the tank slightly pressurized anyway, it takes only a small additional effort to brush a soap solution over all the joints.
A lot of people just put it in the bath tub and then rinse it off well when done.