THE HOME WATER SUPPLY 



55 



or that the weight of the tank when full may prove too great 

 a strain for the house. 



Pressure tanks. On the whole, one of the most satisfactory 

 devices is the pressure or pneumatic tank. (See figure 17.) 



FlG. 1 8. Pneumatic tank system of water supply for country houses. 



This is an iron cylinder, which may be located in the cellar or 

 sunk in the ground below frost line. This is connected with 



