Quote Originally Posted by ivrs450 View Post
My actual equipment :

-Hayward sand filter S244T

-1 main drain and 1 skimmer connected together to a single pipe near the pool pump

-2 returns to the pool from 1 pipe exiting the heat pump and spitting somewhere underground

- all pipes : 1.5 inches

It seems to me that the Jandy Proflo 1.5 HP, 2 speed pool pump, would be a good option.

-Is it powerful enough or too much powerful ?
Assuming you mean the Flo Pro, as shown here, Zodiac Flo Pro spec sheet, it's much too powerful. You should get the 1 HP model. Maximum flow rate -- for effective filtration -- through a 24" sand filter is ~45 gpm.