Name:   steveg - Subject:   Plumber Date:   10/1/2016 7:44:08 AM

Could also be heat recovery which would come off hvac unit. Freon runs through small heat exchanger (breadbox size) which circs water over to water htr and could enter through htr drain connection. Pipe sz 1/2" sometimes. Had one at my place and went htr blew took whole thing out, was leaking at every fitting and heat exchanger looked shot.