ystem No. 2), as it will prevent one heater from has one or more T's in it below the water line to receive the going plans the connections can be firmly fastened, but not .taking the air from the others. steam ris^'r relief (//). confined at their ends, that they may come in their exact If the… … to be carried, the temperature steam mains of a low pressure of the exposure of the heating Fig. l.-SYSTEMS OF PIPING. apparatus should be down and surfaces, and their extent. away from the boiler (except But as it is not my intention here to speak of steam used ex- in system No. 4), and if…
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