Is a 1.0HP Motor the Same as a 1.5HP Motor?

0 thoughts on “Is a 1.0HP Motor the Same as a 1.5HP Motor?

  1. So I have a A.O. Smith/Hayward motor that has a HP Rating of 2.5 SPL and the service factor is SPL.

    So what do I really have? The Motor is an SP1524-Z-1-EFTC or Part number 7-193812-01. I have a 30 foot round above ground pool that has a 54″ wall. 23,000 to 24,000 gallons of water in the pool. What motor should I be looking for if I need to replace my motor (which I have in pieces on my workbench at the moment?

  2. I just installed a new 2 HP Motor with the exact same 1.1 SF on the label as the 10 year old bad one and both are Century USQ 1202’s, same impeller, etc. With a new filter and no obstructions anywhere my gauge is reading over 30 psi and it was always around 24 with the old motor. Is it true that these newer motors are more powerful and I should step down to a 1.5 HP now? This high pressure cannot be good?

    1. Flowrate is limited by the impeller. For example, if you take a 2 HP impeller but install it on a 5 HP motor, the impeller will still only be able to produce 2 HP worth of flow. You may want to try cleaning your filter and checking for any obstructions on the pressure-side of the system (from the pump to the returns.)

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