Yard hydrant with drain port air line

Abstract

A yard hydrant that facilitates the evacuation of water from therein. The wall hydrant has a standpipe having a drain port wherein the standpipe is coupled to a head casing that has a discharge conduit. An air line is mounted adjacent and to the drain port and extends from the drain port to an end that may be attached to a pressurized fluid source. Thus, when water remains in the standpipe even after a closure valve is closed, pressurized air is supplied through the air line and drain port into the standpipe to force retained water toward and out of the discharge conduit.

1 . A yard hydrant comprising: 
 a standpipe having a drain port;    an air line mounted adjacent to the drain port and extending from the drain port to an end opposite the drain port.    
   
   
       2 . The yard hydrant of  claim 1  wherein the air line extends horizontally from the drain port.  
   
   
       3 . The yard hydrant of  claim 1  wherein the air line extends vertically from the drain port.  
   
   
       4 . The yard hydrant of  claim 1  further comprising a head casing having a discharge conduit coupled to the standpipe wherein when pressurized air is supplied to the air line from the end through the drain port water retained in the standpipe is forced toward and out of the discharge conduit.