I have 1" inside diameter loop pipes running out to my pond and back, and I'm building a flush cart for them. I have this 1.5 HP Hayward pump with 1.5" intake/discharge in hand: link to product here. The docs say that I must use at least a 1.5" suction pipe, which I can do. However, since my loops are 1" I must reduce to that size on the discharge side of the pump. I understand that I would lose efficiency, which shouldn't matter in this application. What other problems could this cause? Thanks in advance for any advice you may share.