Noritz GQ-C2857WS US Owner's Manual page 27

(Continued)
The water appears blue
The bath tub/wash-basin has turned
blue
Frequent water discharge from the
drain pipe.
• Coloration to a blue color may be noticed from small
traces of copper ion contained in the water and fat
(furring). However, there are not problems concerning
health. Coloration of the bath tub/wash-basin can be
prevented by cleaning frequently.
• Condensation forms inside the unit during operation
and is discharged from the drain pipe.
27