I'm testing out an old pressure barrrel - what pressure should the safety release valve sustain within the barrel? I have a pressure guage connected, and after CO2 injection it raises to about 2.5 PSI, but then falls off to just above zero. Now this could be because I'm using a guage designed for auto turbo's! I don' t know what pressure I should expect. 1PSI is about 70cm of water - I'd kind of expect a bottle of beer or coke to exert at LEAST this amount - so probably a pressure barrel too.
Anyone got a barrel with a guage? What pressures are to be expected?