DIY internal overflow with external dorso.

I am in the mists of making a overflow for my tank I was thinking it will need to handle a pump around 2000gph .
Q? is this will one 1 1/2" bulk head handle this or should I install for 2
or upgrade to a single 2" bulk head

 

I don't know much about overflows, but I think two 1 1/2" bulk heads would be better, good luck on your project.

 

Well, 1" schedule 40 PVC can handle 960 or is it 980 gph. Going to 1.5" PVC in sch 40 can handle more than 2x the amount of water. So theoretically one 1.5" drain in sch 40 can handle 2000gph. I am one that likes a failsafe though, so I would run 2 1.5"s if i were you.

The other thing is what are you building that would need 2000g of water flowing through it? Head loss will quickly eat up gph. have you done a head loss calculator for your pump?

If not, LMK what you are trying to accomplish. IMHO, no sump needs that much water running through it. Now, maybe you have multiple big tanks running through this piping. That might necessitate this much capability.

 

I was planning on running a Dart 3600gph around 8-9ft head and 4 x90's bends so should still have around 1600pgh im not sure if thats 100% correct me if im off.still as you said alot throu the sump
Could you suggest a better pump for the job.