Help Pipe size

[Blackumbi]

Hi mfk hope u guy can help me i have a 1800 gph pump and i wan to do a diy over flow pipe so my cuestion is how big the pipe need to be i have now 3/4 but its to small if some one have picture can be beter
Sorry for my englis


Sent from my iPhone using MonsterAquariaNetwork app

 

[Dane]

You need to be at least an inch to 1.25 inch. I'm running 2 3/4 inch overflows on a 1200gph pump. See my sig line for pics.