I would like to install a shutoff valve for the toiled. There's just a screw @ the end of the pipe where a valve should have been. I need to shut off the water to the tank so I can change a flapper.

So what is your question?

My

My question is "how to i install a shut off valve on a toilet line??

Can you post a picture of your toilet to show how is the water line connected now, also FYI see the image below will give you an Idea hot to install an angle valve for the toilet, Good luck.

John