364 



LIGHTING AND SANITARY EQUIPMENT 



Tools and Materials Needed: Plumbing tools and tiling spade, 

 hook and scoop, and a carpenter's level are required. 

 Obtain one trap, sufficient 1-1/4" pipe to carry water 

 from sink to a point 5' outside house, suitable fittings, 

 white lead, 50' of 4" sewer tile, and sufficient farm drain 

 tile to reach outlet. 



FIG. 351. A, tile properly laid;B, tile poorly laid. 



Preliminary Instruction: The first requirement of every 

 drain is an adequate outlet or point of discharge. This 

 point must be low enough so the tile can be given ample 

 fall to prevent the sewage or water backing up in the 

 drain. It is considered best practice to discharge sewage 

 from sanitary fixtures thru sewer tile direct to septic tank 

 while the kitchen waste water is usually taken care of by 

 ordinary drains. A smooth, uniform grade must be pro- 

 vided for every drain. In farm drainage work, this is 

 usually established by means of a drainage level. 



Working Instruction: 

 339. Establishing Grade Line for Drain. Determine 



point of outlet and establish a grade line by which to dig the 



ditch. For a small job such as this, when there is a decided 



