Sounds like you put it in the fridge? Then noticed the pressure drop.
Perfectly normal, don't worry about it. By the way that tank pressure gauge is pretty much worthless for determining how much CO2 you have in the tank.
I think the best way to test for leaks is to spray Star-San on the posts and connectors then look to see if any of the bubbles expand, if so you have a leak. You don't have to rinse the Star-San off like you'd need to if you use soapy water but soapy water works too.
Do what you like!
Brew what you like!
Last edited by abracadabra; 07-09-2008 at 02:37 PM.