. Principles and practice of plumbing . ble. In tall buildings, on the other hand, where onaccount of the high velocity in the vertical soil stacks, from a capacity standpoint thepipes could be reduced tovery small dimensions as amatter of fact they mustbe made larger than forcorresponding number offixtures in low buildings,and vent pipes must beplentifully provided, tokeep equalized the pressureof air in all parts of thestack, even when the great-est number of fixtures aredischarging must be borne in mindthat the depth of seal intraps is not over 1% inchesof water, which is
. Principles and practice of plumbing . ble. In tall buildings, on the other hand, where onaccount of the high velocity in the vertical soil stacks, from a capacity standpoint thepipes could be reduced tovery small dimensions as amatter of fact they mustbe made larger than forcorresponding number offixtures in low buildings,and vent pipes must beplentifully provided, tokeep equalized the pressureof air in all parts of thestack, even when the great-est number of fixtures aredischarging must be borne in mindthat the depth of seal intraps is not over 1% inchesof water, which is equal toa pressure of one ounce persquare inch; and if the sealis allowed to be upset,either by pressure or byvacuum, drain air will flowinto the building, or therewill be a gurgling noise. To prevent such a pos-sibility, the system shouldbe so proportioned that atno time will there be agreater pressure or vacuumthan that equal to one inchFis- ■■ of water within the pipes, Eoughlng^forjlxt^ure^s^un Tl„e,. ^higji ^^^1^ ^e eqUal to. Digitized by Microsoft® Principles and Practice of Plumbing 71 .579 ounce pressure per square inch. This will necessitatemuch larger pipes than would be required merely to conductthe volume of sewage flowing through the system.
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Keywords: ., bookcentury1900, bookdecade1920, bookidcu3192402142, bookyear1922
