I have a small pin whole in the copper pipe! I put white plummer tape around it! Not working!Help...

Go get a 1/2 or 3/4 leak repair kit at HD, Lowe's or other supply. Best thing to do is to empty the pipe and replace or try and solder over the hole.

If you can cut the pipe and it allows you install a Shrkbite slip coupling, I would suggest to install one, see the image below, Thanks.

John

Im assuming you are talking about water supply, but could it be the drain? I still see copper drains out there. Let us know, and maybe post a picture of the leaking pipe and we can give you some more ideas.

Good suggestions but if you have a pin hole you are about to get many more. I'd start thinking of assessing exactly what pipe you have and how much of it caan you replace with PEX