View Full Version : Hydro dates

05-31-2008, 08:53 AM
Ok I know I'm gonna sound like a total noob but I'm not so sure I understand how hydro dates work.
some one was selling a tank and said, "Hydro is 2/2007 so good for 4 more years," and I was like wtf wouldn't that mean it expired last year? So what do the dates mean?

Thanks and sorry for this noob fest :)

05-31-2008, 10:52 AM
Hydro is a test that tanks have to pass so they can be filled. Its basically a test to see if when they get under pressure (as they do when they fill up) if they wont bust. They put water in the tank basically if it can hold the pressureized water, than its fine.
Hydros last for 5 years. The tank will need to be tested again in 2012.
Its 5 years from the date on the tank

05-31-2008, 11:48 AM
Ohhh 5 years from the date.
Ok thank you :)

05-31-2008, 01:04 PM
So basically. When a tank is re-tested, its really just undergoing a test to see if it still holds the water? and if it does it's good for air?

When you re-hydro, they dont replace anything? just test?

05-31-2008, 01:56 PM
they just retest.
I think they put like 5/3s water into the tank. and if it can hold it, then its fine. If it wont, your tank is dead