Q: What if I cannot see the water in the tubing very well?

A: Add a few drops of food coloring to the water. This will make it more visible in the tubing.

Q: I am worried about water leakage where the 6 mm tubing is inserted into the 10 mm tubing. Should I seal that joint?

A:It’s OK to seal the joint if you wish. However, we did not notice any leakage in our system. The 6mm tubing seemed to fit snugly inside of the 10 mm tubing. If you do observe a leak, then seal the joint with tape.

Q:I set up the circulating solar water heating system and the pump started working. However, the water would not circulate. I observed a bubble in the tubing that stayed in one place. What should I do?

A:Most likely the pump is not getting quite enough electrical power to do its job. Tilt the solar panels until they are facing the sun directly. This should provide enough electrical power to circulate the water.

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