I tried to remove cartridge with broken off stem with much difficulty,I finally pried it out with a screw driver.I replaced it with new cartridge,but after opening for vave for water to come out the water leaks out and drips.what can I do to stop it.

Thanks,
Don

What's the brand name of the valve? How old is it? Where does it leak from? The stem or the spout? Back to you, Tom