. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 44 BULLETIN 906, U. S. DEPARTMENT OF Fig. 23.—Overflow stands. diversion. The valve is controlled by a float in an auxiliary stand. Such an arrangement would have v a hi e where high pressure pipe is laid down a steep g r a d e , and where relief stands would have to be ex- cessively high to back water up to all points of diversion. In the above case, water was intended to be used for domestic use and some provision was necessary to keep con- siderable pressure at each diversion point. It was not practica
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 44 BULLETIN 906, U. S. DEPARTMENT OF Fig. 23.—Overflow stands. diversion. The valve is controlled by a float in an auxiliary stand. Such an arrangement would have v a hi e where high pressure pipe is laid down a steep g r a d e , and where relief stands would have to be ex- cessively high to back water up to all points of diversion. In the above case, water was intended to be used for domestic use and some provision was necessary to keep con- siderable pressure at each diversion point. It was not practicable to allow the entire head of water on the pipe on account of the steep grades and long length of the main, and relief stands at frequent intervals, high enough to deliver water to the second story of a house were too expensive, and at the same time unsightly. DISTRIBUTING HYDRANTS. After water has been conveyed to the field or orchard, the type of distributing hy- drant or valve should be selected to suit the soil, grades, and crops to be watered. The most common type of valve con- sists of a stand of one length of con- crete pipe that is fitted with a number of small gates (figs. 25 and 26), the size of the stand and number of gates de- pending on the num- ber of furrows to be Supplied from one joIG. 24.—A diversion stand with covered top and valves. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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