I think the half closed black valve is hilarious.
I'm guessing it was an
Attitude to the service department gets you a half closed black valve
Situation.
'I'll see your petulance and raise you a half open black valve...later. My iou is as good as gold.'
'I will gladly pay you a shit-storm on Thursday, for your tirade today'
A lesson for all to us to consider regarding beratement of service folk.
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