In general, no. The water level in the overflow is very sensitive to the back pressure on it. Small changes and variations end up causing significant changes in the water level in the overflow necessitating adjustments of the gate valve. The more you have running off of the overflow standpipe, the more likely you are to have these variations and difficulty keeping the system tuned.
I need to put T to my return and no overflow output?T off your return pump to the fuge.
Yes but they are more like a wet trickling take the variation minimizing the need of adjustment and there is bubbling that are gonna come out if the in use.
Okok nice can you take a picture inside of your conerflow ? and do you run 1 1/2" that you reduce or its all on 1" ?
ok and under the tank at the sump tu expand back to 1 1/2" or you stayed at 1" down to the sump?