How do you bleed the air from your roof mounted solar pool heater?

To bleed the air from your roof-mounted solar pool heater, start by turning off the pump to prevent water from flowing. Locate the air relief valve, usually found at the highest point of the system, and slowly open it to allow trapped air to escape; you may hear a hissing sound as air is released. Once water starts to flow steadily from the valve, close it securely. Finally, turn the pump back on and check for any leaks.