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[pscocoa]

A vac check is not sufficient as a test .. it works in totatally the "wrong" direction so can only detect major problems .. it cannot detect a small leak at a joint as it sucks the joint tight ... whereas normal pressure forces it apart ....... applying suction (Vac) to a system that runs at around 14bar is useless... which is why a PRESSURE check with dry nitrogen is the only thing that works..... not rocket science but appears to be beyond the numpties who try to sell it.. and often succeed ..

They did the nitrogen test first