Just replaced old main to exterior spigot valve in utility room with a comp valve. I cut as little as I possibly could off on either side of the old valve and replaced it with a new compression valve but there wasn't enough copper for the ring to seal. Had a very difficult time trying to squeeze the 2 ends closer and maybe over-tightened to keep the pipes from pulling apart. It leaks when opened. Do I need to replace the whole valve or can I seal it with quiksteel epoxy putty or something? Not a plumber (obviously)- help asap please and tysm. Will try uploading a pic if post is too vague.