Tube time

I have my trailer aired up to 80 lbs installed in a water tank. No leak. No air in the morning. I did this three times. Took it to a tire shop twice they had it aired up to 80 lbs. In the morning it has no air. It's like someone is letting the air out. I ordered a tube. Ever had something like this happen? Stan

Squirt soapy water around the bead. Both sides. I have one that had to come off and get reset to seal up.

Replace the valve stem

To lose that much that fast would be a major leak.

May need to submerge the entire wheel, look for the unusual like a pinhole in the wheel where it's welded to the center.

It looks like this post has exactly the same problem another YT post had I was discussing through email with a fellow YTer. I will quote what he said in the email .. what I think I read may not be what you think you wrote.. Is the tire in question installed on a tank trailer to carry water or is the tire submerged in a tank of water to check it for leaks? I agree about the valve stem. Spray a little soapy water around it and push it sideways in all directions and see if bubbles form. My son bought a Yamaha scooter, to ride to work about 15 miles. The rear tire would loose air intermittently, it would be fine at the start of his trip nearly flat when he got to work. It would hold air fine while setting even overnight. Went so far as to buy a new tire. When removing the rear tire to replace it he found the valve stem was bad. The small tire had a lot of centrifugal force on the valve stem while in motion and that is the direction you could move the stem and make it leak. If you do have the tire in a tank and it shows no leak but is flat in the morning I am smelling a rat. Hummm maybe a modified TPS monitor that will actually deflate the tire by cell phone command. Sounds like a story line for a police detective drama.

What part of "in a water tank" is everyone missing?

Had a similar situation but with a tube. It would go flat overnight in a tire but SUBMERGED in water, no bubbles whatsoever.

Left it inflated for a few days in the basement. One day heard a BOOM! but couldn't figure out where it came from. I had forgotten that I left the tube in the basement, and it had split along the seam and fell down into the dark wash basin where I found it months later.

When I worked in a repair shop I did all of the tires as I was the low man. We had a 3/4 ton service truck that seemed like almost always it would be low. The boss told me to fix it and I tried to find the leak, so I punched a hole in the tube and patched the tube, No more leaks. I assume I seated the valve core better

Check the rim as well as the tire. I chased a leaking tire, I thought, until leak finder liquid being sprayed on the bead, happened to hit the right spot on the rim. Low and behold there was a pin hole in the weld at the center of the rim.

I had so much soap on the tire, and rim I finally I had to change the water tank that I put the tire in. All I could see was bubbles, but not from the
tire. The tire and rim are so clean I can paint the rim. Stan

Barnyard, I hate to stir the pot here but it is so fun and
I can only hope someone gets an occasional chuckle
out of it. What part of ..somehow a part of his trailer
can be aired up to 80 lbs and somehow he can install it
in a water tank.. does everyone not get? That is exactly
what his first sentence tells us. Sure I can read
between the lines and say xyz. But for a real definitive
answer in my book Chief will have to come back and
clarify exactly what he meant to write.

Let It down to 40 psi,I use a soapy rag and wet it down and let it set for an hour. Either the stem is coming apart(brass & rubber coming apart) or it is leaking in the sidewall. And if it still will not show a leak, try again at 20 psi. My last job was running the shop at a tire store,I was there for 13 years.

I usually read my post before I send it. Somehow I missed this. As most have figured out by now I meant, inserted in a tank of water, and saw no
bubbles. Stan

When I have that happen to a bicycle tire I put Slime in it and ride it, end of leak! If this is a high speed trailer tire you probably don't want to do that, it wouldn't stay balanced.

Should have added did you check the actual valve stem core for a leak? Growing up on the farm I was taught to always spit test everyone after adding air. Just put finger to mouth and put a little spit across the stem and see if it bubbles up. Then it was certain the next time it was low it would have to be broke down and repaired.

Mix some dish soap up kind of stout. Now spray it on the sidewalls of the tire leave it set. I'll bet you see what looks like shaving cream bubbles on the outside of the tire. I get a lot of that on tires for wagons and such where they just set in the off season on things. Put a tube in them and it is fine then. If you can find a good tube. It seems like I find one good tube in about 3-10 tubes anymore.