Rinnai REP199i Installation And Operation Manual page 56

5.7.3 ThermaCirc360™ Recirculation (Dedicated Mode)
Plumbing Diagram (Dedicated Mode)
Hot Water Supply Line
Figure 88
56
Hot Water Fixtures
Dedicated Recirculation Line
Rinnai Tankless Water Heater Installation and Operation Manual
Figure 87
Gas Supply Line
Cold Water Supply Line
Locate Drain
Valve as close
as possible to
the Cold Water
Supply Tee