A thermal expansion joint or conduit

摘要

In order to provide a compact thermal expansion joint or conduit for a solar collector panel array, the expansion joint or conduit (2.002) includes a tube formed into one or more curves (2.024, 2.026, 2.028), to adsorb movement of the collector headers due to thermal expansion, the tube being a helical or corrugated tube enabling the curves to be compact and smaller than the minimum bending radius of a smooth tube.