upr000334 31

PIPE LIIB-Las Vegas, Repairs to— LOS ANGELES, Nov. 13th-1917 Pile 613 * MR. H. C. MIT: Referring to my letter of August 13th- 1917, addressed to Mr. Poulson, copy to you, regarding repair of leaks in the new pipe line at Las Vegas. Since the date of this letter, a great deal of work has been done in repairing leaks, and on Wednesday, November 6*feh, the line was again tested. In making repairs it/was necessary to open the pipe about each 100 feet yplace a man inside and seal the Joints with cement from the inside. Where the pipe was opened and at the time the last test was made, there were a number of eaposod lengths of pipe at each opening, that is, the/pipe at those places was not encased in concrete. During the test all of the exposed pipe showed evidence/of sweating freely under a 19 pound pressure and 4 lengths split, allowing the water to escape in such volume that it was necessary to shut it off. n . This pipe was purchased from the Pacific Sewer Pipe Company under a guarantee that it would with­stand an internal working pressure of 30 pounds. I discussed the subject of safe pressure "•for vitrified pipe with the Los Angeles Pressed Brick Company and their Engineer went into the matter quite extensively. He assured me that his company would not hesitate to guarantee their pipe for the required pressures The order was later placed with the Pacific Sewer Pipe Company. Our requisitions, however, called for the same specifications as to pressure and I was informed by Mr. Adams that that company ^did not hesitate to accept the order under the requirements. It is evident, however, that we received something very much inferior to what we expected and required. Under a second test, near the head of the line, one piece of pipe broke under about 6 pounds pressure