I have a 3 valve shower/tub. One hot valve, one cold valve, and then the diverter valve in the middle.

The tub was slowly dripping. So after lots of videos and research, I replaced all of the valves.

During the process, however, I was unable to remove the valve seat from the center valve, which is the shower diverter. I was able to put new valve seats on the hot and cold valves.

Well, the shower still "runs". I replaced the rubber washers on the valves that connect to the seats on the hot and cold yesterday, thinking they were torn or worn or something. But really, there was nothing wrong with them.

So my main question is this: If both the hot and cold valves are sufficiently "off" (and are sealing properly), can a worn valve seat or a poor "seal" on the diverter be the cause of a continuous "drip"? Like I said, the diverter valve is new (part of the kit I bought). But the valve seat is the original one, quite likely.

Thanks for any help you can provide.

The diverter ONLY changes which outlet the water flows to. If you have a continual drip, (not one that eventually stops dripping), the the problem is in the hot and/or cold sides, and your repairs were not done properly.

HJ,

Thanks for the reply. I kind of thought that was the case...just needed to make sure. Just gonna have to tear back into it, and see if the new valve seats have some sort of deformity or burr on them when I put them in, allowing water to get past the rubber seals from the hot and/or cold valve(s). It's something to do with the valve seats I would imagine. The new valves don't leak anywhere. :-\

the new seats do need some sort of sealer on the threads.
usually a touch of pipe dope will do it.
lack of sealer can cause water to seep up thru the threads causing the problem you have.

Thanks alot. I will give that a shot this weekend.

That is something I have NEVER done. The seats are a metal to metal seal unless they come with a gasket or "O" ring, which few do.