Upon arrival clients stated that he noticed the leaking drain pipe when he went to change his filters. Upon further inspection of the drain pipe I found that the coupling was not glued together as well as it should be. I cut out and replaced the T coupling, coupling and pvc pipe. I added spacing from the t coupling and coupling to give it less room for error. I tested the repair by pouring water into the drain pipe. No leaks occurred during testing. Unit is in proper working order upon departure.