Cumberland losing air???

When I used it two times and the pressure was fine. Now it keeps deflating on me. Any thoughts about why??

Could be a small pin hole leak but also be jumping to conclusions check the valves. Make sure there is no dirt in the threads that can also be the issue.

For me the valves have always been the issue. Dirt, cloth, line can get caught in the treads or the in between the rubber seal and cap.

I hope this helps

Plus one for the valves. The only time I’ve had any trouble with my Cumberland it was in the main seal of the valve. Has to be clean and perfectly flat. Take it apart wipe it off with a little alcohol and make sure it’s all lined up when you put it back together. Then make sure it’s good and tight but of course don’t strip it. If that’s not it and you do have a pin hole somewhere you can use Tear-Aid type B for vinyl. It works great. Hope this helps.

Just do an overall check for leaks,
It could be in the Boston valves or you may have small seam leak or just a pinhole.
My advice is to remove your air bladders, inflate your bladders and check everything for leaks.

Good luck!

SP Dan