Thread:

Impeller size verification

Big side is 9"
Little side is 7.25"
Angle is 125*-90*= 35*
So is this an "A" ?

1. The impeller is marked AB.

2. Your "small diameter" measurement is being taken at the wrong point. You need to measure the smallest diameter of the exit vane. From the third pic, I estimate that to be about 1/4" less than the 7.25" you show in pic #2, giving a minor diameter of 7.0" which would fall right between an A(7.25") and a B(6.75"), hence AB.

3. The angle shown is actually 180 - 125 = 55 degrees. An A would be 60 degrees.

Thank you