My wife and I have the Intex B15' x 48" model pool. We're using the Krystal Clear Model 633T Filter Pump, which I realize is oversized for this size pool, but sure keeps the water clear. I'm wondering if there is an adjustable inlet nozzle that will fit the male threads on the inside wall of this model pool. Intex sells an adjustable inlet nozzle for 18' diameter pools, and larger, but I suspect it is a larger diameter than what I need...part #11074. Maybe an after market brand? Thanks.