POULTRY LABORATORY GUIDE 115 



EXERCISE XXXVII 

 Repairing Damaged Heating Systems 



Repair any broken places in the asbestos cov- 

 ering to pipes on heater by mixing the pulp asbestos 

 with warm water until it is a httle thicker than 

 cream, and apply with a smooth trowel, rubbing 

 in thoroughly and leaving the surface smooth. 



Look over all pipes and joints carefully, and 

 see that there are no leaks ; if so, repair same as 

 follows : — 



First examine the coils and determine the way 

 in which they are joined to the headers at each 

 end. This is usually accomplished by means of a 

 union or a right and left nipple. Loosen these 

 on the pipe or pipes to be repaired and disconnect 

 the leaking joints; if the threads are injured, run 

 the die over them to cut deeper; if not injured, 

 replace the pipes, placing white lead on the 

 threads before screwing up. 



In studying the piping learn to distinguish the 

 following fittings: elbows, tees, reducers, coup- 

 hngs, nipples, unions, etc. 



Measure the diameter of the various pipes, both 

 inside and outside; which of these dimensions is 

 the standard size of the pipe ? 



Repair any worn or leaking valves by grinding 

 and repacking. 



