I am a first time post-er. Hello. A little background and I'll start the questions flowing. I recently purchased my new house which was built it 1930. Something is always leaking. I am currently trying to replace a in-line water valve that controls the hose bibs outside. Originally there was an old style ball valve that was held together with four small bolts and fell apart into three pieces. I can't seem to figure out how to get the new ball valve to not leak. I use a lot of teflon tape, but one side will always leak. I put the valve on one thread all the way and then on the other thread halfway. What ever side I started with leaks. Is there a trick that I'm missing. Any feedback would really be appreciated, Thanks in advance.

 

Wrap the teflon tape 2-3 flat wraps clockwise only as the threaded end of the pipe faces you.

 

Hi, As I read your post I think you are trying to install the valve between two threaded pieces of pipe that are already connected on the other end. I don't think it can be done. If the pipe is copper or pvc cut it and install the valve then solder or glue the pipe. The house is 73 years old and you may have steel pipe. Go back to the nearest fitting and replace with copper or pvc. They make adapters to fit either.
Good Luck woodbutcher