Mmmh, Interesting. B having a larger diameter should be able to cover better and seemingly catch any flow of oil which may want to escape from the
side. However, A might be able to act like a straw in a glass and if it had enough suction power, would be able to draw that flow in.
I could see it going both ways, I think A would work as long as it is a pretty tight fit and it goes into the pipe a few feet. I can see B working as
long as they have some way to keep it attached. The only thing I can see is if they attach it to that flange some how.
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