HOT WATER INSTALLATION 187 



lation and then keeping the water at a mod- 

 erate temperature. 



Caution. In any system see that the ex- 

 pansion tank and the pipe leading to it are 

 placed where they will not freeze. As there 

 is ordinarily no circulation in the water they 

 contain they will freeze if placed where the 

 temperature falls below freezing. The re- 

 sults will almost surely be disastrous. 



