Only the -09 comes with either 3/8" or 1/2" outlet. The -07 only comes in 3/8" outlet. The price difference is something like $2 apparantly between the -07 and the -09.
So the -09 it was then. I would've thought it would be more attractive too in that it could come in either flavor, making it suitable for 3/8" kit users.
Yes - pump noise is what I am most concerned about now.
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