On 31 January 2014 10:37, The Leonards <pamks at bigpond.net.au> wrote:
> Gents > Use a balloon attached to one of the inlets/outlets of you tank. > I did the balloon thing on a tank I built recently. It was a riveted aluminum tank with lots of pro-seal. Put the balloon on the vent, put the air hose on the outlet, inflated the balloon, closed the outlet valve and left it. The balloon stayed up. After about 4 hours I decided that was good enough and let the air out. 2 days later I decided I wanted to make a dipstick for the tank so I set the tank at the orientation it would be in the parked aircraft and started filling it with water from a measuring jug. I got less than 4 litres in before water started leaking out. By the time the tank was full (about 32 litres) I had significant leaks from about a dozen spots. All this from a tank that 2 days earlier tested as airtight. Any suggestions? Cheers, Tony
