Thanks for the replies. So, having two 0.5" drains sufficient for flow in the sump? Someone told me before that it's not enough flow in the sump? I am at lost here..
As for return, should I use 0.5" or 3/4" return? Do you think a mag 3 or maxijet 1200 powerful enough for return? Any suggestion here? I think I can use a directional U-tube for return and attached a ball valve on it to prevent back flow.
Thanks