Went to get the motorhome out of our storage garage today. My TPS system usually takes a minute or two to kick in once driving. The low pressure alarm went off. My motorhome says to keep tire pressure at 90psi but I normally keep them a few PSI above 90. My right rear inside tire was indicating 62 PSI and the other 5 tires were between 93-96 psi. I only live about 4 miles from my house so I drove slow and parked in the driveway. I have a big air compressor in my storage garage but I have a small one at the house. I was able to get the PSI in the low tire up to 76 PSI with my little compressor and drove slowly to a local tire place that does truck tires.As soon as the tire guy came out, he said your problem is probably that tire valve extension. He said 90 % of the time, a slow leak on an inner tire is because of the valve extension. I don't know if he tightened the extension or put a new one on but he said its fixed now (so far PSI is the same).Is this a common problem? If so, what is the fix? If there wasn't an extension I am scratching my head wondering how you air up the inner tire?I guess I will know if the issue is fixed tomorrow but so far PSI hasn't changed on that tire since it cooled down from the drive home.Burch

Two very common issuesTire valve extensions especially the flexible kind (more on that in a bit) And screw on TPMS sensors. I went with Dully Valves on my Rig when I put on new shoes (Tires) they are metal and are really very long or very bent valve stems. Loved those things.

I also had problems with the flexible extender. It only leaked when driven was found quite by accident by my mechanic. When I got new tires, I went with solid extenders on all wheels.

I put metal valve extensions(from NAPA) on my MH. When I screwed them on it began to leak. I backed off a couple turns until the leak stopped. Haven't had a problem in 20k miles.

wa8yxm wrote:Two very common issuesTire valve extensions especially the flexible kind (more on that in a bit) And screw on TPMS sensors. I went with Dully Valves on my Rig when I put on new shoes (Tires) they are metal and are really very long or very bent valve stems. Loved those things.I think John meant to say "DUALLY VALVES"Dually Valves

larry cad wrote:wa8yxm wrote:Two very common issuesTire valve extensions especially the flexible kind (more on that in a bit) And screw on TPMS sensors. I went with Dully Valves on my Rig when I put on new shoes (Tires) they are metal and are really very long or very bent valve stems. Loved those things.I think John meant to say "DUALLY VALVES"Dually ValvesI ordered the dually kit from yourtireshopsupply.com (link above) and it was one of the best things I've done for my rig. I was having trouble with extensions....the one piece valve stems are the way to go and work well with TPMS sensors.

Inside tire valve extensions | Good Sam Community

wa8yxm
Explorer III
Jul 01, 2021
Two very common issues
Tire valve extensions especially the flexible kind (more on that in a bit)
And screw on TPMS sensors.

I went with Dully Valves on my Rig when I put on new shoes (Tires) they are metal and are really very long or very bent valve stems. Loved those things.
two_travelers
Explorer
Jul 02, 2021
I also had problems with the flexible extender. It only leaked when driven was found quite by accident by my mechanic. When I got new tires, I went with solid extenders on all wheels.
routeforty
Explorer
Jul 02, 2021
I put metal valve extensions(from NAPA) on my MH. When I screwed them on it began to leak. I backed off a couple turns until the leak stopped. Haven't had a problem in 20k miles.
larry_cad
Explorer II
Jul 02, 2021
wa8yxm wrote:
Two very common issues
Tire valve extensions especially the flexible kind (more on that in a bit)
And screw on TPMS sensors.

I went with Dully Valves on my Rig when I put on new shoes (Tires) they are metal and are really very long or very bent valve stems. Loved those things.

I think John meant to say "DUALLY VALVES"

Dually Valves
scbwr
Explorer II
Jul 02, 2021
larry cad wrote:
wa8yxm wrote:
Two very common issues
Tire valve extensions especially the flexible kind (more on that in a bit)
And screw on TPMS sensors.

I went with Dully Valves on my Rig when I put on new shoes (Tires) they are metal and are really very long or very bent valve stems. Loved those things.

I think John meant to say "DUALLY VALVES"

Dually Valves

I ordered the dually kit from yourtireshopsupply.com (link above) and it was one of the best things I've done for my rig. I was having trouble with extensions....the one piece valve stems are the way to go and work well with TPMS sensors.
oldave
Explorer
Jul 02, 2021
I have learned the hard way that extensions are just another possible
problem.

The best solution is a new stem specially shaped to bring the end out
where you want it.

They are available at the link above, here it is again.

Dually Valves
Dale_Traveling
Explorer II
Jul 02, 2021
MetalGator wrote:
,,,Is this a common problem?,,,

It can be a problem but having extensions should not be a reason not to inspect the tire for damage such as nails or a sidewall abrasion along with checking the valve stem seal and the extension. A little soapy water goes a long way with the confidence that the trip will be uneventful.

I've had two leaks. The valve stem seal that went while going down the road before I had a TPMS (destroyed the tire before I could get off the road) and a slow leak at the bead seal, post TPMS, after new tires were installed. Not had any problems with the extensions.
atsrmf
Explorer
Jul 09, 2021
Buy a pair of these, I'm glad that I did! Be sure to order the correct pressure.

Crossfire
scbwr
Explorer II
Jul 09, 2021
Another vote for

https://yourtireshopsupply.com/category/796/dually-valve-kits
RLS7201
Explorer II
Jul 09, 2021
I've had the steel braded flexible extensions on my coach for 20 years with no problems. Ya think there might be something about installing them correctly?

Richard