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Old 09-09-21, 06:56 AM   #3
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Join Date: Apr 2011
Location: Strathroy Ontario Canada
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Default Automatic air vent

Yes they do work however with some limitations.
1st the working pressure reduces the volume of air exiting the device.
2nd the addition of anti-freeze also impeads the automatic feature.

1/8 NPT is the size and they can be manually operated. They work but not as effectively as the tiny boiler vent type with a screw driver slot.

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