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 176
cock, so thatthe wear due to opening and closing the blow-off may be taken by the valve and the cock willremain tight and prevent leakage. It is always advisable to have the blow-off discharge openlyabove a floor trap or sump so that leakage will be readily apparent, should the cock becomeworn.… … Fig. 42. Grates Assembled, Showing Connecting Bar in Place. of the system. Subsequently the blow-off should be used occasionally only, except in springand fall. Water service connections must be provided for both steam and water boilers, for refiUingand for the addition of make up water to boilers.…
Building · Heating · Ventilation
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