. Principles and practice of plumbing . Fig. 87Lift Checl: Valve Digitized by Microsoft® Principles and, Practice of Plumbing 181. Fig. 88Swing Check Valve valve, on the contrary, the water must pass through a re-duced opening in the valve seat and must make two rightangle turns while doing so. Ground Key Cocks.—Ground key work may be eitherstop cocks for controlling water in a pipe, or faucets fordrawing water at a fixture. Theonly difference is in their ex-terior appearance, the princi-ples of construction and opera-ti6n being the same for both pat-terns. Ground key cocks can behad for lead
. Principles and practice of plumbing . Fig. 87Lift Checl: Valve Digitized by Microsoft® Principles and, Practice of Plumbing 181. Fig. 88Swing Check Valve valve, on the contrary, the water must pass through a re-duced opening in the valve seat and must make two rightangle turns while doing so. Ground Key Cocks.—Ground key work may be eitherstop cocks for controlling water in a pipe, or faucets fordrawing water at a fixture. Theonly difference is in their ex-terior appearance, the princi-ples of construction and opera-ti6n being the same for both pat-terns. Ground key cocks can behad for lead pipe, for iron pipe,and, in the case of stop cocks,they may be had with one endthreaded for iron pipe and theother end prepared for lead for iron pipe can be hadtapped with female threads or threaded to screw in a sectional illustration of a ground key cock is shown inFig. 89. The plug, a, is ground to a water-tight fit in the cock, b, and water isturned on and off bygiving a one-quarterturn to the lever, principal objec-tion to this kind of acock is that the con-stant wearing of theplug and cock
Size: 1581px × 1581px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidcu3192402142, bookyear1922
