Most systems are closed loop, meaning that the same water & environmentally friendly antifreeze mixture is continually circulated throughout the loop field; it never escapes. Closed loop is the only type of loop field allowed by some states.
An open loop field, sometimes called "pump & dump", requires an ample source of groundwater. Open loops are less common than closed loops because they require an significant water source below the surface.
Term ID: 730dd6ec-cda1-4b63-b664-93fecc07cc38
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