2 1/2 hp pump ?

[newtopools]

My pump and filter are up and it has 1 1/2"? pipe fittings. Should I try and have them replaced with 2". I have a brother in law that is a big help when he visits. He could do it I'm sure. The pump came with the pool. It does have a high and low. Low is 1/2 hp. High is 2 1/2 hp. It is a 33' pool by 52". I'm so excited. It is filling now. Thanks, Sharon