Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 152
shall have a check valve, and also a stop valve between the check valvo and the boiler. BOILERS AND RULES FOR CONSTRUCTION 133 58. When there are two connected boilers (gravity return system), a check valve and a stopvalve shall be installed in the branch pipe to each boiler, as shown in Fig. 35.…
Building · Heating · Ventilation
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
