I had a hot water recirculation pump installed just over a year ago. Now, my water stinks when I turn on the hot water tap and I have luke warm water in my cold water line. I was told to drain off the water in my hot water tank, but this did not solve the stinky water problem. If I turn off the pump, the stinky water goes away. However, I then have to wait a long, long time to get hot water. I suspect that the hot water standing in the pipes helps bacteria to grow resulting in stinky water. Has anyone else had this problem? How do I solve the problem?