Cyclopedia of heating, plumbing and sanitation; a complete reference work . m, the air will he discharged at the expansion tank, and air-valves will not he necessary at the radiators. Fittings. All fittings, such as elbows, tees, etc., should he of the lang-iurn pattern. If the common form is \\sv(\, they should he a size larger than the pipe, busheddown to the proper size. The long-turn fittings, however, are preferable,and give a much better between the radiatorsand risers may be made with theordinary short-pattern fittings, asthose of the other form are not welladapte
Cyclopedia of heating, plumbing and sanitation; a complete reference work . m, the air will he discharged at the expansion tank, and air-valves will not he necessary at the radiators. Fittings. All fittings, such as elbows, tees, etc., should he of the lang-iurn pattern. If the common form is \\sv(\, they should he a size larger than the pipe, busheddown to the proper size. The long-turn fittings, however, are preferable,and give a much better between the radiatorsand risers may be made with theordinary short-pattern fittings, asthose of the other form are not welladapted to the close connections nec-essary for this work. Pipe Sizes. The size of piperequired to supply any given radiatordepends upon four conditions; first, thesize of the radiator; second, its elevation Fig. 104. Automatic Air-Valve for oKnve the hoiler• third the leno*th ofHot-Water Radiator. Operated aDO\e uie Doner, intra, Uie leilgUl OI by a Float. pipe required to connect it with the boiler; and fourth, the difference in temperature between the supplyand the return. 120 HEATING AND VENTILATION 111 As it would be a long and rather complicated proeess to work outthe required size of each pipe for a heating system, Tables XXVI andXXVII have been prepared, covering the usual conditions to be met with in practice. TABLE XXVI Direct Radiating Surface Supplied by Mains of Different Sizes and Lengths of Run Square Feet of Radiating Surface SlZK OF PlPE 100 200 300 400 500 ftRun 600 ftRun 700 soo Run 1 in. 30 1!:: 60100 5075 50 2 200 150 125 100 2} 350 250 200 175 150 12.) 3 .-,.-,!» 400 300 275 250 225 200 175 150 3* 850 600 451) 400 350 325 300 2511 225 4 • 1,200 850 700 600 525 , 450 400 350 5 ? 6 • 7 1,400 1,150 1,0001,600 7i in1,400 8501,300 ,706 650 1,000 1,500 These quantities have been calculated on a basis of 10 feet differencein elevation between the center of the heater and the radia
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