STORAGE AND DISTRIBUTION. 



155 



If the pipes were laid straight forward (as is the case 

 when the gradients are slight) from the furthest 

 point of supply to the reservoir, the lead would not 

 flow properly into the joints on the down gradients 

 and lead wool should be used in this case. For 

 testing the far end has to be plugged. Screw plugs 

 used for drain testing are quite unsuitable, and 



Strap- 



2fcft Straps 



Such a piece of 



Leather* 



Strap 



FIG. 123. 



although a cap may be leaded on it must be properly 

 strutted to prevent its blowing off, and in any case 

 it is an awkward job to cut such plugs off, and con- 

 sequently it is usual to resort to some form of 

 removable cap for the purpose, 

 apparatus is illustrated in figs. 

 123, 124, 125, the drawing being 

 quite self-explanatory. Any 

 firm who supply hydraulic ma- 

 chinery can provide the cup 

 leathers, the rest of the appara- 

 tus being supplied by a local 

 blacksmith. The apparatus is ^ffate ij 

 very useful to contractors who Socket End, 



do much of this class of work, FlG< I25 ' 



as a test is always a desirable thing, A small tap 



