Originally Posted by bclemens
As a side note, most statements I make are opinion on what I know about the situation. Every situation is different and without knowing the whole story I can only speculate.
Based on the message, I assumed the "threaded section" was not long enough and therefore would not accept an air gauge. As I re-read it appears that you think the valve extension is not long enough. My question would be what are you using to check the air pressure? Warranty only covers items that are a factory defect. If you can post a picture I can add more. The only reason for them to deny the claim is if the valve is working, but maybe you need a reverse chuck to check it?
In response to your questions...
I am using a truck tire air pressure gauge to check the tires. It does have a reverse chuck. The inside dualie tire valve stem is so short I can't reach it with my fingers to remove the valve cap to check air pressure. It is way inside the wheel cover and doesn't allow two fingers inside the hole. So, I can't check air pressure or add air if needed. I can't figure out how to add pictures to this message.
My old Forest River Solera 24S had flexible valve stems for the rear dualie tires that were mounted on the wheel cover. They worked fine until the wheel cover fell off (not once, but twice) and yanked both valve stems out. I ended up with 2 flat tires. So, I'm not a fan of the flexible valve stems.