Detailed Product Description

 solar product :Closed Closed--loop systems require an expansion tank. An expansion tank has a chamber in which air is locked inside a bladder or diaphragm. It screws into standard ½inch or ¾inch threaded plumbing fittings. When pipes are filled with heat transfer fluid (water and glycol), and the operating pressure of the system is set, the fluid will occupy a given volume on the temperature . As the fluid is heated by the sun, it expands. This is where the expansion tank is critical. Without it, something would blow! The expansion tank allows the fluid to safely expand by compressing the air in the chamber.