Slow drip on outdoor faucet (wall mount). Appears to be attached to copper pipe with just adhesive of some type (plumber's dope?). It is about 14 years old, on a commercial building. Is this repairable or will the faucet need to be replaced? The inside wall does not offer any type of access to the pipe. The outside wall is wood siding. The copper pipe appears to have plenty of room to cut and put a new faucet on. Shouldn't the new faucet be sweated on with solder? Tips? Thanks.