Rinnai RSC199i Installation And Operation Manual page 14

3.5. 1 Supply Connections
Condensate
Drain
Figure 6: Supply Connections
Table 3: Supply Connections
Gas
Cold Inlet
Hot Outlet
Condensate Drain
Pressure Relief Valve
14
Hot Outlet
Pressure
Relief Valve
1.22 (31.1)
5.31 (135)
7.72 (196)
Connection
Rinnai Tankless Water Heater Installation and Operation Manual
Cold Inlet
.10 (2.57)
5.6 (142.2)
Connection Size
3/4 in. NPT
3/4 in. NPT
3/4 in. NPT
1/2 in. NPT
M33 Thread
.59 (15)
Gas