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This solar SpiroTop automatic air vent prevents contamination and leaks and provides a solution for filling and venting systems, making and keeping the high points in pipe systems air-free and preventing air pockets from forming. Thanks to a reliable venting mechanism and special construction, the valve closes completely and is protected against leaking from the significant gap between the valve and the water (at least 40 mm) which prevents valve contamination, one of the main causes of leaks. The special valve seat has a very long life. This SpiroTop air vent is connected to the system by a female connection. With smaller connections, bubble blockage may occur, and the device stops working. This most used SpiroTop air vent (AB050) comes with an industry-leading 20-year guaranteeFeatures & Benefits: Spirotech Spirotop 1/2 inch Solar Automatic Air Vent - 10 Bar 180 Degrees Celsius, 180 degrees Celsius, 10 Bar, Prevents valve contamination and leaks, Solution for filling and venting systems, Air-free pipe system and prevents air pockets from forming, Reliable venting mechanism, Valve closes completely, Long life, Female connection, 20-year guarantee. Spirotech Spirotop 1/2 inch Solar Automatic Air Vent - 10 Bar 180 Degrees Celsius AB050/008