 | Electric engineering - 1919 - 524 pages
...the reverse of the two-pipe system. In this case the lowest pressure is at the ends of the mains, so that steam introduced into the returns at these points...will be no pressure to force the water back to the Fig. 26. Connections Made to Establish "False" Water-Line when Boiler is below Basement Level. boiler.... | |
 | Charles Lincoln Hubbard - Heating - 1909 - 276 pages
...system. In this case POWER, HEATING AND VENTILATION the lowest pressure is at the ends of the mains so that steam introduced into the returns at these points...no pressure to force the water back to the boiler. There is but little difference in the cost of the two systems, as larger pipes and valves are required... | |
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... connection for each radiator. When the return main is overhead, the risers should be dripped through siphon loops; but the ends of the branches should make direct connection with the returns. This is the reverse of the two-pipe system. In this case... 
