ATD - This hole is bleeding air all the time

Model;
X500BH60VATD 9864

Works fine except there is a small hole just below the pressure line running from the compressor to the tank. This hole is bleeding air all the time.

Can it be plugged?

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Bill says...

Sorry. I'm not getting it.

There is a hole in the air line from the top of the compressor pump to the tank, or there is a hole in the compressor pump housing?

How big is the hole? If in the pump housing, is it threaded?

Bill