I have a leaking problem in both my Blue Robart Valve. The first one when new holded pressure OK but after sitting unused for several months it started to leak. I thought I had a bad valve so I bought a new one and the same thing happened. :angry: After an hour or so there is not enough pressure to operate the gear.

I know the problem is in the valves because when I put them, installed in the airplane, inside a glass of water you can see bubbles escaping from it.

I have changed the O rings and lubed them with BVM O Lube to no avail.

Is there any way to fix this permanently, other than buying new valves each season?

I would appreciate any comments.

Eduardo