Question

What is the purpose of an expansion tank for a hot water boiler?

a) to allow for expansion and contraction of water volume at varied temperatures
b) it has little value and could be plugged
c) the expansion tank will hold the extra water needed for operation
d) none of the above

Answer 1

The purpose of an expansion tank for a hot water boiler is to allow for the expansion and contraction of water volume and to prevent excessive pressure in the boiler system.

Step-by-step explanation:

The purpose of an expansion tank for a hot water boiler is to allow for the expansion and contraction of water volume at varied temperatures. When water is heated, it expands, and without an expansion tank, the increased volume can cause pressure buildup and potential damage to the boiler system. The expansion tank acts as a reservoir, holding the extra water needed for operation and preventing excessive pressure.