Looks good-just put a ball valve on the inlet to the fuge so you can limit the flow there and leave the 2 drains into the sump. Make sure to put some type of screen over the drains so that larger critters/algea dont plug the drains or get into the sump. The 2 drains would be safer than 1 in case the flow is reduced or cut off on 1 from algea etc...