The connection going from my water meter into my regular water pipe is leaking. It is a threaded and collared connection and it uses a washer. It is new as I had to replace the pipes and pressure regulator yesterday. All of my soldered connections and all others are fine, but this one connection won't stop dripping. I have tried with and without tape. I have tried with 1 and with 2 washers. I have even tried cutting my own washer out of washer material. How can I stop the dripping?