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3.51 Supply Connections <br /> Condensate Cold Inlet <br /> Drain Hot Outlet Pressure <br /> Relief Valve <br /> 0 <br /> D° ^ BSI I <br /> O <br /> ,ir <br /> _ ® + + C� D GAS <br /> M <br /> o� + <br /> � o <br /> � M <br /> r �. <br /> N @ L + _ <br /> N W <br /> - C\j M <br /> .36 (9) a 5.6. (142) <br /> 1.22 (31) .—. Gas <br /> 5.10 (129) <br /> a 7.75 (197) <br /> Figure 6: Supply Connections <br /> Table 3 <br /> Connection Connection Size <br /> Gas 3/4 in. NPT <br /> Cold Inlet 3/4 in. NPT <br /> Hot Outlet 3/4 in. NPT <br /> Condensate Drain 1/2 in. NPT <br /> Pressure Relief Valve M33 Thread <br /> Rinnai Tankless Water Heater Installation and Operation Manual 14 <br />