Waterway Center Discharge Wet End 3/4 HP 310-1120

The wet end i purchased fit and works very good no issues. The only problem i might have is that the old wet end had a 310-1110 number on it which told me that it should have been a 1/2 hp pump so I did what was said to do since that part number was no longer available I went up a 1/4 hp to part number 310-1120 which is supposedly a 3/4 hp pump. When I took the old wet end off the motor I noticed that the impeller was twice the size of the new impeller. The new one is very skinny half the width of the old one. And the jets definitely dont seem to push as hard as the old one did with the same motor. The old housing was wider and had more volume. But according to the numbers it should have been smaller. Im going to see if the jet pressure will be sufficient for my needs. Why would the impeller be so small when jumping up in horse power. Is 1/2 hp the right rating on the old wet end? Seems to me it wasn't right. The impeller on the old was about 3/4" thick the new one wasn't even a 1/2" thick. The motor is rated for 1 1/2hp. Did i need to order a higher then 3/4hp like part number 310- 1130 or 310-1140. Any help figuring this out would be greatly appreciated thank you and thankyou for shipping the one I ordered so fast. Thanks again .

All great delivered to the uk thanks regards dave