Main drain on overflow pool (Infinity pool)

[Repe]

Hi,

I'm in process to start build new pool, do I need install main drain on overflow pool. For removing water after heavy rains with out main drain, can I just use waste from filter?
Pool going to be 4x8m 1.4m deep rectangular pool, going to run it with 1hp variable speed pump. For the inlets how many inlets and what kind positioning, would recommended that size pool?

 

[agent86]

I have a large infinity edge pool and I have two drains in the bottom with a dedicated 3HP pump that returns water into main pool. Also in the infinity edge basin I have an overflow grill that empties into an underground french drain that goes on for about 30 feet in case I get too much rain and the pool can't take any more water...