I got the Hayward variable speed and on the box it states 2" plumbing required 2.5" recommended. I have 2" suction side and 1.5" return side. Since it's variable it will be dialed down as far as it can go, prime will run at 65% for 6 minutes, new pump hp says 2.0 frhp (2.7 thp). No solar, no spa, no water feature, should I be concerned about my 1.5" return? edit filter will also be upgraded to hayward de 48 sqft.