Solar heater air

[Russmd]

I have the rooftop solar heater panels for my pool. They were replaced recently due to age deterioration and work well. They put in air bleed valves such that they drain when the pump turns off (I don’t believe the previous system had them as I never heard them back then). When my system turns ON, I get a lot of loud banging and gurgling through the pipes on the roof and in the equipment, and big bubbles at the pool jets as the air is pushed out. Sometimes it seems as though some air remains in the panels as I see bubbles for quite a while afterwards. Why are these valves necessary? Why must the water be drained out each time? I have no freeze issues here. Thanks.

 

[Russmd]

Clarification-When my system turns ON I get the banging and bubbles, when it turn off I hear the sucking sound from the valves as they drain.

 

[mknauss]

Solar Pool Heaters - Further Reading

www.troublefreepool.com

 

[1poolman1]

Clarification-When my system turns ON I get the banging and bubbles, when it turn off I hear the sucking sound from the valves as they drain.

Solar vacuum relief valve. Allows the panels to drain when not in use. Normal for there to be a lot of air entering the pool at first start of each solar heating cycle.

 

[Russmd]

Solar vacuum relief valve. Allows the panels to drain when not in use. Normal for there to be a lot of air entering the pool at first start of each solar heating cycle.

Thanks. If no freezing risk, is it necessary that the panels drain each day? Why?

 

[mknauss]

Please open the link I posted above. It shows why you need to drain the solar panels.