Hi, I have a Convair TRB portable air conditioner and I dont have an instruction manual. I'm wondering about the drainage outlets on the rear of the unit. The top one (half way down) has a black tube connected to it that runs out the window with hot air duct. The bottom one doesn't have any sort of plug in it and water constantly drips out. My question is "should that outlet be plugged to stop the water draing?" If so where can I get a plug from to fit it?

I have another portable air conditioner (also refrigerated) and it has the bottom drain port plugged. The difference is that my Convair model has a second one with a hose attached (ie it has 2 outlets). I was under the impression that the unit reuses the excess water rather than expelling it. I have another portable air conditioner (also refrigerated) and it has the bottom drain port plugged. The difference is that my Convair model has a second one with a hose attached (ie it has 2 outlets). I was under the impression that the unit reuses the excess water rather than expelling it.