Replacing 1 hp motor to 1.5 hp

kplaster

Bronze Supporter
Jan 24, 2010
653
Randleman,NC
Need to replace the motor on my Hayward Power FLO Matrix.The old motor is a 1 horse 2 speed.Want to change to a 1.5 horse 2 speed.Would there be any difference in the propellor size? Any other issues I should be concerned about? I liked the 2 speed.But,the 1 horse on low speed pressure is a little low and would love to increase water flow a little.Would it be a noticeable difference??
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
29,694
Laughlin, NV
If you want full hydraulic horsepower of your larger motor, then you need to change the impeller and diffuser.

Check with Inyopools on what you need for the wet end you have.
 
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kplaster

Bronze Supporter
Jan 24, 2010
653
Randleman,NC
Yes,I check the site last night and they only show propellers for 3/4 and 1 horse motors.I wouldn't think a 1/2 horse increase would affect propeller size.Any Help will be helpful.I like the 2 speed.But,I dont run my pump all the time.Its on a timer running 6 hours in morning and 6 hours in the evening. I only use high when cleaning
 

Chasarms

Well-known member
May 8, 2020
147
Dardenne Prairie, MO
Yes,I check the site last night and they only show propellers for 3/4 and 1 horse motors.I wouldn't think a 1/2 horse increase would affect propeller size.Any Help will be helpful.I like the 2 speed.But,I dont run my pump all the time.Its on a timer running 6 hours in morning and 6 hours in the evening. I only use high when cleaning
Assuming the 1 hp and 1.5 hp motors turn at roughly the same RPM, the 1.5 hp motor is not going to move significantly more water than the 1 hp using the same impeller unless the 1 hp was underrated for the system.
 
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