My angle stop seems to be soldered to copper piping. How do I change it to keep the hot water shut oof valve from leaking water when turned off?

My angle stop seems to be soldered to copper piping. How do I change it to keep the hot water shut oof valve from leaking water when turned off? My hot water in the bathroom sink shut off valve leaks when it is turned off.

This may be as simple a fix as tightening the packing nut behind the handle.

Tighten, but do not over tighten the packing nut with the stop in the off position.

This may be as simple a fix as tightening the packing nut behind the handle.

Tighten, but do not over tighten the packing nut with the stop in the off position.

The bonnet packing nut's located just under the handle on the stem,(see image) As Growler advised, do not over tighten. Good luck, Tom

If you had room, a torch, and the skill to use it, likely you would have skipped the step of posting here. Also if you wanted to hire somebody. You are looking for other options? Do you mean water continues to flow in the off position? You may get away with just replacing the washer. Shut the water off to it, and unscrew the nut the stem comes out. Pull the whole works out and look at it. If it has a bad washer, but the seat is Ok, a new washer is a cheap, easy fix. If it has other problems, you may be able to find a replacement for all the guts at a hardware store.

Otherwise if you have room, buy a Shark's Tooth to male pipe fitting. If the tubing is 5/8'' OD, buy 1/2'' Buy a ball valve and a pipe to compression 90 degree fitting. You need to be able to make a clean cut to remove the old valve leaving about a 1/2 inch of smooth copper tubing to slip the Shark's Tooth fitting over it. You may have to make a hole in the wall, but the escutcheon should cover it. Screw the 3 fittings together with your preferred pipe sealant, and with the compression fitting turned upwards, slip the shark's tooth fitting over the stub of copper pipe.

Loosen nut and remove "guts" from valve housing--replace with "guts from new valve and no soldering will be involved.