I have had my bags installed for close to a year now. I noticed they were leaking when I first installed them by airing them up to 90psi & spraying connections w/soapy water. Made sure I recut the ends perfectly straight. Now, if I do the 90 psi test unloaded, they don't leak. BUT if I put 50 psi in them & haul my trailer camping for a few days, when I get home & unhook, one will have about 35 & the other about 45psi. This is measured w/an accurate digital gauge. What could be the problem? TIA

 

Hmmmm....
Let's look at the differences in situations first.

You installed them,tested, and when you re-test - no leaks when unloaded and stationary and "real time". You didn't say how long you let them sit with the 90 PSI before checking.

Then you put in less than the test-air PSI, add weight (and motion w/towing) and then add a time interval (few days), and they have lost air, and I assume the one that is lower in your explanation is ALWAYS lower on that side ?

So the differences between the two circumstances are:
Weight
Motion
Time

Of those three, I would think that something with the weight or motion (or both) might somehow change some aspect of a fitting or connection or profile which then allows air to slowly escape (when under load). You haven't mentioned temperature - perhaps that is pretty constant between the 90 and 50 air loads ?

When you inflate unloaded, as a test inflate to the 50PSI, then give them a couple of days - check. If they have not lost air, then it has got to be somewhere in the combination of weight and loaded motion. If they have lost air, there has got to be a slow leak somewhere (interesting that it wouldn't exhibit on fuller inflation immediately).

It is a puzzle, but perhaps by looking at one aspect at a time, the solution can be found. Good luck !

 

I'll fill them today w/50 psi, then check them on Friday & see where they are @.

 

Also do you put 50psi in before or after you hook up to your trailer and a few days later is it with the same load (trailer or no trailer) when you check your pressure?

 

50psi w/no load. After adding about 9K it makes it go to about 62psi somehow. I always thought psi would stay the same as long as the container the air was in didn't change in size. I know the shape of the container shouldn't make a difference. Then I check after taking the load off & that is when I get the lower reading.