Rinnai GTK03U Installation Instructions Manual page 2

1. Remove the tankless water heater from the box and lay it flat with the front cover facing up
(Figure 1).
Figure 1
2. Wrap Teflon tape (field-supplied) around the threads of the cold water inlet and hot water
outlet (Figure 2).
Figure 2
Hot water
outlet
Cold water
inlet
GTK03U Pump Kit Assembly Instructions
Lay water heater flat.
2