Where to buy valve extension

I don't recommend extensions because they are more prone to leak as you found out. Instead install a dually valve kit like the Borg dual steel valves. Yes it will cost more.

Ditto CA Trav. Nothing but trouble. I've had them leak and the rivets pull out of the hub and flail around.

What you want is long tire valves. Any truck tire place can install them.

X3. Ditch the hoses and get the Borg dually valves.

I have solid valve extension that extend straight out through the hole in the out side wheel . Never had one leak. Can get them at most truck tire dealers

BORG DUALLY VALVE

Extrenders... any truck stop will have 'em

Recommendation (This takes a tire stop to install) DUALLY VALVES Google 'em

I just put those on my Duals.. WelL Belle Tire put 'em on.

Oh man are they nice. and this is not an "Extension" but a new valve stem.

It's common for mfgs to have a short rubber valve stem installed the same way for all tires. When mounted on the front that stem points out so access is easy. For the inside dually that stem also points out but it's behind the outer tire. Then for the outer dually the stem points in. Hence access to both duallys is more restricted.

So to correct that situation they install less reliable extensions at your cost.

Best money I've spent so far on one project was the solid valve stems. In 3 years running now, I haven't had to add air to my tires. Before, with the extensions, I had to add air every time before a trip. I still check the pressures and I still perform a visual inspection of the tires before every trip, but I don't worry about losing air pressure like I used to!

My MH came from the factory with plastic like/phenolic valve stem extenders. Never had any problems or air pressure loss using them. I bought a set as spares but never needed them, they are available through WBGO.

Ours come straight out thru holes in the in the wheel. We bought them and had them installed at a truck shop about 7 yrs ago. So far no leaks or problems.