I'm trying to connect a 3/4" copper water line from street to Meter and the line is old and has a 1" brass compression valve. When I hooked it all up and turn water on from street it leaks at the base of this valve which has a sleeve on bottom side. The whole valve turns I can't get it tight enough or is it possible the line isn't tightened to what it screws into in the ground?

How can I replace or what should I use to replace this outdated valve?

Roddy can't plumb

to replace the 'curb stop' you need to get the city/town involved.

I think he is referring to the main shut off valve ahead of the meter in the basement. WE would need a photo of your valve to give a diagnosis.

possible that it is a flare fitting or you need a meter washer. i would try a washer one from the end of a garden hose will seal it. that is if you have meters like we have here. hope this helps.

Call and explain to your water provider. They should help you do the correct thing here.