Pool water is pumped through the filter and then through the solar collectors (panels), where it is heated before it is returned to the pool. A whole set of solar pool heating system includes the following:
A solar collector – the device through which pool water is circulated to be heated by the sun
A filter – removes debris before water is pumped through the collector
A pump – circulates water through the filter and collector and back to the pool
A flow control valve – automatic or manual device that diverts pool water through the solar collector