164 CREAMERY BUTTER MAKING 



injector, so that the hot water may readily be drawn 

 into the boiler. The heating pipes must all slope towards 

 this well. Where the boiler floor is lower than the 

 creamery floor an oil barrel sawed in two may be made 

 to serve the purpose of a hot well. 



A reducing valve should be placed near the boiler so 

 that any amount of pressure may be carried in the heat- 

 ing pipes. With a good valve of this kind a pressure 

 as low as one pound may be carried when the boiler 

 pressure varies from twenty to iifty pounds. 



The cost of steam trap and reducing valve should not 

 exceed $15. 



