I have the exact same problem that you have David - the 1/2" female connection on the supply hose for the cold water part of the faucet has a black rubber o-ring that is supposed to seal against a male brass fitting. It does not seal the connection. I tried leaving it somewhat loose, then tightening it and testing it several times, still with no seal. After it failed as tight as I could get it, I took it apart and the rubber o-ring was torn apart. I tried it again with a fresh o-ring with the same results at increasing levels of tightness. Any idea on how to get this to seal? How did you get it to work?
Originally Posted by David D'Agostino