I've been told to cap the elbow piece that comes out of the floor. this elbow requires a pipe with standard thread, on to which a cap can be screwed, having standard threading. since the elbow piece has a non-standard thread i decided to buy the pipe. the end that goes into the elbow is male and has a rounded edge so that it seats against the 'female' interior wall of the elbow (like a ball and socket). the seal, it appears, is made when a nut around the pipe is tightened, thus pressing the tube into the 'female' elbow. the leak comes from this union.
what solutions are there for the leak myself?
can i use the putty that hardens on the brass? on the exterior surface of the nut, at the seams? Thanks for your help.