Heat Exchanger Assembly For Gas-Fired Hot Water Boiler Hot, 4 Section, Cast Iron, Maximum Operating Pressure:50 Psi, Top Connection:3/4"N.P.T., Side Connections:3/4"N.P.T.(1) X 11/4"(2), Dims:15"H X 13"W X 161/2"L, Weight:189 Lbs, In Bulk, Made In Unknown. (Both Do Have Minor Rust On Them)