Hi,

I am having issues with leaks when performing the drop test and i am unsure whether it is the actual catch pot that has tiny leak somewhere.

After going through all the bagging steps and getting to a point where i feel the bag is securely down i pull a vacuum with both lines clamped off. At this point with both lines clamped i am right in saying that i shouldnt loose any pressure on the gauge?

I will leave it for 15 mins and i have lost pressure on the gauge, about half an inch usually. The bag itself doesnt feel like it has lost any pressure until i undo the clamp to the catch pot.

If i repeat this process but when coming back after 15 mins i run the vacuum pump to show full vacuum on the gauge again then undo the clamps, the pressure gauge doesnt move. 

I cant tighten the clamps any tighter and just using the ones that easy composites supply, so assume these are good and its not a case of my bag is leaking and the clamp isnt securely clamping hence the pressure loss?

Any advice on a method i can use to prove its the catch pot leaking?

More likely to be the fittings/hoses than the actual catch pot itself. If you go along and isolate small sections of the setup by clamping the hose at various points and watching where the leaks occur, you should find it.