Temperature and Pressure Relief Valves

A 40 gallon tank expands by 1/2 gallon when heated to hot water temperature (180F?).

http://www.watts.com/pages/support/tp.asp?catId=64

Solution:

• Temperature & Pressure Relief Valve (activates typically at 210F and 150PSI
• Expansion Tank
• Relief at inlet (no check valve at inlet of pressure tank)