hi
auto air vent is leaking ,have tried turning the grub screw to get it to stop ,nothing happening ,A=is their a way to stop it.B=or is this a faulty unit.C=how hard is this to change
A: Not really
B: Yes
C: Not hard, drain down and swap it out.
:edit: it may just be junk it in stopping it from operating correctly, however for the cost of the new unit and ease of replacement compared to stripping it and trying to get it to seal etc., fit a new one.
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