Drain pipe decision

[Feet4Fish]

In my overflow I have three predrilled holes. Two can accommodate 1.5” bulkheads and the other a 2” bulkhead. You planning a Bean Animal. So... should I use the two inch as the emergency or the primary full siphon?

 

[lapin]

In my overflow I have three predrilled holes. Two can accommodate 1.5” bulkheads and the other a 2” bulkhead. I am planning a Bean Animal. So... should I use the two inch as the emergency or the primary full siphon?

2" for emergency

 

[ca1ore]

Yes, 2” for emergency.

 

[Feet4Fish]

Thanks guys!!!