Solar Thermally Pumped Hydroponic System

Step 5 Assemble and test

The coupler is screwed onto the reservoir bottle and the 1 liter bottle screwed on top of the coupler. Take the bottle outside and place in the sun, watch as the water is pumped up into the bottle as the reservoir is heated by the sun.


Although the original theory was based on the differential between day and night temperatures, observations showed that clouds passing in front of the sun was sufficient to cause a rapid change in the water level, providing a continual refreshing of the nutrient to the plant.