WATER SUPPLY 



38i 



tank, are certain to fill in time. The filling usually makes 

 itself evident by a gradual lessening supply of warm water. 

 In the case of a water back such as is used in a kitchen range, 

 an explosion is occasionally produced because the pipes 



Pressure 



a 



k Pressure 



Pressure . 

 e/fher c/irecfion 



f Pressure 



C After University of Minnesota 



Fig. 299. General construction of globe and gate valves and proper way 



to place them 

 a — Globe valve c — Cross valve 



b — Angle valve d — Straightway or gate valve 



