Originally Posted by cgoing
The original inserts were Z60055 also they just cheapened the design to the screwed on mylar and gave dealers no warning. That being said that style semi recess valve with either style cap( quarter turn or threaded) always leaked with the caps off. They relied on the cap being the final seal.
If the cap gasket does not seal it that is another issue. Do not grease them or use thread tape as that will cause further problems.
A lot of times the insert seal can get damaged if not installed using the correct tool.
This seems crazy that the valve doesn't do the job. Just seen it first hand though after my brother in law left the cap off over night at the weekend and the tube went totally flat. I didn't really believe the below when i watched it the other night when panicking the tube was flat.
Is this the same for all RIB's or just the Zodiac ones? Do other Zodiac owners have the same issue? Is it worth me replacing the valves or not?
Thanks for any help