Client’s existing Weil Mclain AquaPlus 100 indirect fired water heater was leaching an unknown lime-green substance into the potable HOT water supply. After attempts to flush and drain the indirect water heater and installing a 3M Aquapure hot water filter (that got clogged in days with this substance) we installed a Navien NPE-240A tankless water heater. When we got the old indirect back to our shop we took an angle grinder to cut a hole in the side of the tank. Just as we suspected and Weil McLain denied, the plastic dip tube was non-existent. The obvious answer is the dip tube disintegrated and fragments traveled into the hot water supply line clogging all the faucets, shower valves and aerators in this 7,900 square foot home with 12 bathrooms. An expensive dip tube.
