I just ordered from the exact same person.
My beckett leaks, and I had to glue it together. It is supposed to work without glueing.
Let me know how all of yours turn out.
When I got it, I took my becket, and inserted the input side into a 1" vinyl tubing, connected it to my MAG 9.5, and stuck the output side into my sump. It blew plenty of bubbles, but also leaked profusely from the seam above the air holes ( the pressurized side ). This was with the parts that came with it. I have a suspicion that this particular item may not be the real thing. This is only because I have posted a lot and no-one else has ever had this problem.
johntbyrne, I got exactly the same story/treatment ( late delivery & refund for shipping ) from this guy.
Let me know how it goes.
Stu