The 1/2HP Whisperflo (motor is an AO Smith QC1052 from what I have gathered) has spun the rear bearing ( I took off the rear inspection cover and witnessed it spinning in the race) and makes a pretty bad grinding noise, I lubed it and its a little quieter but I know it will fail before too long.
I am considering replacing with a 2 speed for energy and noise reasons. What do I need to know about replacing my motor with a 2 speed one? Since my current one is a high efficiency one so I need to up the HP if the new one is not? Any issues with running this particular pump at the lower RPMs of low speed?
Thanks in advance.