JENNING’S PATENT CHAIR AND SADDLE PIPES.
The chokage in pipe sewers generally arises from one or more of the following causes:—
(1.) Improper gradients.
(2.) Insufficient flush.[185]
(3.) Foreign articles finding their way into and choking the sewer.
(4.) Defective joints through which the liquid runs leaving solid matters behind.
(5.) An excess of road detritus or of ashes, through the house closets of the poor, finding their way into the sewer.
(6.) Improper bends in the line of sewer.
(7.) Right-angle or improper junctions being formed with the sewer.
(8.) A collapse of the sewer.