New FNS Plus 60 doesn't sit straight?

Mar 31, 2017
Middle Island/ NY
Hi guys, So I started to install all my new equipment. I poured a new Concrete pad for filter and pump and it's level frt to back , side to side and diagonal.. when I sit the FNS 60 on it, No matter where I sit it it leans towards the drain / valve side?? Are they designed this way. It's only slightly off but, looks as if I didn't have pad perfectly level . I included pics! Pump sits level.

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