My house came with the 2.2 gpm aerators on all faucets and today I replaced the one in the kitchen with a 1.5 gpm to help save some water. It came from Lowes. Everything is OK but it whistles a good bit louder than the previous aerator, especially when the water is turn on all the way. Is it normal for this to be louder than the 2.2 aerator or do you think I bought a defective one? If so, I guess I'll just have to get used to it.