WATER-DISTRIBUTING SYSTEM 411 



PC. No. Ref. No. Name of Part 



2.677 18 Regulating nut. 



2.678 19 Supply valve, complete. 

 2,423 20 Rubber seat. 



2,603 21 Supply-valve spring. 



Connect union fitting 6 with the pipe from the air reservoir, 

 and connect the pipe to the water reservoirs at WT, inserting 

 a check- valve, cut-out cock, and five-way cock in this pipe. The 

 valve is adjusted to deliver 20 Ib. pressure on the water for 

 forcing it throughout the car. Necessary readjustments are 

 made by nut 18. 



Pressure entering the valve at PR passes to chamber a. 

 thence past valve 19 to chamber b, and by passage c to WT and 



the water tanks. As the pressure in the latter approximates 

 20 Ib., piston 12 is forced down and spring 21 closes valve 19. 

 As the air pressure in the water tanks diminishes through the 

 use of water, the pressure on piston 12 is likewise affected, and 

 the piston being forced upwards by spring 17, opens valve 19 

 and restores the air pressure in the water tanks. 



