Replaced stems and still leaking...

your stem is most likely worn out beyond repair best thing you can doto save you any more trouble is remove the stem and take it to your nearest specialty plumbing store they can match it up with a new one and usually have most replacement stems on hand and they are fairly inexpensive. one thing to remember with new stems is the packing nut is usually loose so make sure you tighten it when you install it

you either do not have it seated all the way or you have damaged an o-ring anytime you are putting togethr parts with o-rings you should make sure and put stem grease on the o-rings to ensure not to cut or damage them. if you have damaged the o-ring instead of a whole new part you can take the o-ring out take it to your local hardware store and match it with a new one. dont forget the stem grease.

The same part works for both Hot & Cold sides. Usually preset to work on Hot (counter clockwise on, clockwise off). To set for Cold, simple remove the plastic clip from the top, slide the ring tab off, flip it over and put back on (you can only put it on one way since there's a flat "key" in it matching the stem) Now its set for Cold (CCW of, CW on). HTH

You did not tighten the stem enough, allowing the seat to rise just above the cavity where it will sit. You may also have scaling in this area preventing the seat from sitting flush.

ok you will need to replace the rubber seat and spring under each valve. You start by removing the plastic insert in the center of the valve. Remove the screw inside of handle and pull handle off. There will be a gasket under that and then you will see a bonnet. MAKE SURE THE MAIN WATER IS OFF before you proceed any further. Remove the bonnet by turning it counterclockwise. Once you have removed the bonnet then pull the stem out make sure you take care to notice exactly how it came out. Underneath the stem is a rubber seat and spring you can use a phillips screwdriver to insert in them and remove both. Replace them with new ones and re-install. If you are not very good at this sort of thing I recommend you call a repairman. Inserting of the stem back in its proper place is extremely important as it has to seat or it will not function properly. If you have any questions just ask.

Thx

the whole faucet is bad it has an internal leak replace the whole thing

The seat probably need either ground flat or replaced. Pull the stem and inspect where the washer seats for grooves or an uneven surface.

They make a seat tool specifically for seat removal but a fairly large allen wrench usually will work if you don't have access to one. If it's not too deep of a groove you can rub it on a piece of fine grit sand paper but make sure it's flat on the surface and not slanted. If it's very deep at all, you will be better off to take it to the local plumbing supply to match it for replacement.

As far as the washer, T&S used slightly different sizes of washers depending on the model but just use the largest one that will fit inside the lip and flush with the bottom of the stem and it will seat well. I generally have better luck with the beveled.

Some times the seat gets worn anout of round. there is a tool you can buy called a faucet reamer or reseating tool. this shoul help thanks