We've been using our TST for a year and a half. The only time we had a leak it was because we hadn't yet changed our rubber valve stems to metal which is recommended.
Do you have rubber or metal valve stems?? Rubber valve stems could cause slow leakage.
You might try to set the valve stem at the bottom position on the tire and pour some water over the whole sensor and valve stem to see if you get any bubbles. If you see them, try to determine whether it is the valve stem or at the o-ring of the sensor. If there are no bubbles, you may have a leak somewhere in the tire or rim.
I agree that a phone call to TST would also get you some answers as leaking is definitely not the norm. Hugs, Di
Originally Posted by jimkate
I bought the TST 510 system last fall. It was easy to install, and a great relief to know the status of all the tires all of the time.
I concur with the other comments regarding the rubber washers. I do believe it is a problem. I bought new tires two years ago, and I have not had to add one pound of air since then in any of the tires.
That was until I installed the TST sensors. Now I have one tire that loses about 5 pounds every couple of days, and two tires that lose 5 pounds every couple of weeks. I haven't talked to the folks at TST about that yet, but I will. Maybe I can get them to send me some new washers.