Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 230
Fig. 98. Air Cock. HOT=WATER PIPING Heater Connections. Where only one heater is used, the con-nections are practically the same as for steam heating, except that nocheck-valves are used. W^here two boilers are to be connected and arranged to be runindependently or together, valves must be inserted… … Safety Valye Main riow Pipe
Architecture · Building · Carpentry
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