using 4-HP spa pump for pool temporarily

VAwaterboy

Active member
May 10, 2014
27
Falls Church, VA
My 1.5 HP pump motor died and I ordered a new (variable speed) one, which won't arrive until Tuesday. I have a spare 4 HP motor from a hot tub. If I can connect that motor to the wet end of my old pump and use it for the next few days, will it do any harm? I assume the water would move through the system much faster, under higher pressure; could that damage the filter?
 

mas985

TFP Expert
LifeTime Supporter
May 3, 2007
13,703
Pleasanton, CA
If I can connect that motor to the wet end of my old pump and use it for the next few days, will it do any harm?
No, it shouldn't

I assume the water would move through the system much faster, under higher pressure; could that damage the filter?
Actually, the flow rate will be about the same. It is the wet end that determines flow rate and not the motor.

But make sure the frame type is the same for both motors.