I have used all three variations with great success. All of the type that use the plastic washers seem to seal better with two washers than one though frankly as I have said, I have had zero issues with any of that type. The first type with the compression type fitting would occasionally leak but both variations of the type with the washers work wonderful. I prefer my octo on the hookah port than on the Phoenix but again that is a preference probably from having always used it there.
I also made my own design using a stainless AN flare fitting B nut and custom machined adapter but it was more difficult to make than the simple plastic washer type so why reinvent the wheel .
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I also made my own design using a stainless AN flare fitting B nut and custom machined adapter but it was more difficult to make than the simple plastic washer type so why reinvent the wheel .
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