. Bulletin of the Department of Agriculture. Agriculture; Agriculture. C<7p<?o/^ 320^<:7/. {6\ ^y^<fcj^yi:Kxu =D I _ ^ _. Fig. 30.—Double chamber septic taak for family of si;c people, suitable to conditions where outlet fall is difficult to obtain. The sewer from the house should be of vitrified sewer pipe, usually of 4 inches size, ^vith tightly cemented joints, and should be laid to a grade not less than 9 inches per 100 feet. Where the fall from the house to the tank is excessive, it is a good idea to lay the last 100 feet of tile to the minimum grade to break up entrance
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. C<7p<?o/^ 320^<:7/. {6\ ^y^<fcj^yi:Kxu =D I _ ^ _. Fig. 30.—Double chamber septic taak for family of si;c people, suitable to conditions where outlet fall is difficult to obtain. The sewer from the house should be of vitrified sewer pipe, usually of 4 inches size, ^vith tightly cemented joints, and should be laid to a grade not less than 9 inches per 100 feet. Where the fall from the house to the tank is excessive, it is a good idea to lay the last 100 feet of tile to the minimum grade to break up entrance velocity. It is assumed that the farmer has a working knowledge of small con- crete structures.^ The septic tank should be constructed as nearly water-tight as possible, preferably of concrete. The walls should be 6 or 8 inches thick, the floor 4 to 6 inches thick, and the roof about 6 inches thick and reenforced. Some means should be provided at the bottom to facilitate the cleaning out of settled sludge. Either the floor may be sloped toward the inlet end for this purpose or a pipe 1 1 U. S. Dept. Agr., Farmers' Bui. 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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