1HP pump the same GPM output as the 1.5HP version of the same pump?

[JohnFoe]

I am looking at two pumps.

1HP and a 1.5HP
Both are dual speed

http://www.poolsupplyworld.com/Pent...Ground-Pool-Pump-without-Cord-115V/340204.htm

http://www.poolsupplyworld.com/Pent...Ground-Pool-Pump-without-Cord-115V/340206.htm

According to the "specifications" PDF document the 1HP and 1.5HP have the same GPM curve. However the electrical savings is 33% on the 1HP.

I was going to do the 1.5HP, but I don't see a logical reason to not go "smaller" if the end output is the same. Is there something I'm missing?

 

[cfherrman]

I didn't look but probably ft head is different

 

[JohnFoe]

The 1.5 and 1 HP both have the same curve. I mean it doesn't sound right, but if it is true then it would be a waste to spend $100 more to get the 1.5 HP if the 1HP is basically the same GPM.

I think I'm going to go with a 1HP, but didn't know if anyone else has any experience. I plan to use the low speed most of the time and this pump doesn't have a curve for the low speed which is strange.

 

[JamesW]

Go with the smallest pump. The red curve is not that far from the other one.