Too much booster pump

[mas985]

Reducing the voltage too much on an AC synchronous motor with pump will probably damage the motor. Synchronous motors will always try to run at the same speed no mater what the voltage so it is likely the pump will stall and burn up since it does not have enough input power for the impeller load. To change the speed of the motor you would need to change the voltage cycle rate (e.g. 60 Hz to 40 Hz) which is very difficult and expensive to do. Or you need a second set of windings which is what two speed pumps do. I suggest looking for a smaller HP booster pump if available.

There are pressure side cleaners which do not require a booster pump but they generally do work as well. This one needs less PSI than most:

http://www.poolplaza.com/merchant.mv...Category_Code=