Pipe Laving and Pipk Line Failures 



105 



Fig. 18. — Laying the concrete pipe fo: 



i;..ii;, I'.'r 'J.ly .ji Ti 



under slight pressure head. A fourth man prepares the mortar and 

 brings it in pails to the trench, and one or two laborers, following 



Fig. 19. — Laying 20-incli cement pipe in shallow ditch at Continental. 



close back of the bander, backfill the trench enough to cover at least 

 two inches over the pipe. In hot weather it should be backfilled at 

 least 8 inches over the pipe. A water tank mounted on wagon trucks 



