In article ,
dennis@home wrote:
The float vent I have in my hand has a screw on the top that appears to
close the vent even if the float is not floating. I believe it is really
for fast filling a pressurised system and not actually an auto vent to
release trapped air. It looks like you open it to let the air out while
filling and then close it to ensure air can't get drawn in by the
circulating water. Maybe yours is the same and you have it closed?

The reason for that valve it is the device will leak past the float valve
when it gets older. So you shut it off after the venting is complete.

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*Toilet stolen from police station. Cops have nothing to go on.

Dave Plowman London SW
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