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You can't have a drop that's longer than the pipe length
Thanks very much for these. Here are the results I get, I think I've entered the correct info although it doesn't take into consideration my 90° turn into the sump.
If that's correct it's says I'll be getting around 2,400 gallons per hour through the 1 inch drain? Can that be correct??
Sure about the drop vs. length? I'd guess you are in the range of 1600-1800 gph with your elbow so if you consider that your pump has at least the same 36" head, I'd say it is ok to underpowered rather than overpowered for this tank.
Bruce
the elbows will reduce flow somewhat which is why I guesstimated 1600-1800 gph considering that you calculated around 1900. Now just determine how much flow your pump will have at the height where water enters the aquarium and you will know. I have become a big fan of oversizing the pump and flowing into a manifold that handles all of my reactors as well as the return. In my 75g that is being rebuilt, I am going to put the skimmer (Lifereef venturi) on the manifold as well to get all of the extraneous pumps out of the relatively small sump.
Bruce
One issue that hasn't been mentioned here is noise level. I'd put gate valves on both drains and be prepared to use either as the main "full syphon" drain. I don't think the pump size is going to be a problem because as already mentioned, you can always valve the return. You could also consider getting a bit fancier with the outlet of the return in the tank. Diversify it a bit and have two or even three adjustable nozzles that you can move from time to time.
I'm going to be setting up a 92 corner, 3/4" return, 1" drain, with a ~20 gal sump. I recently did a test run using a Jebao DCT8000. I cranked it all the way up and the drain handles the flow with no issues. I won't be running it that high but wanted to see what would happen. Unless I'm missing something you'll be fine.
Yes, it looks like the pump at max output is fairly close to the calculated flow. You should have no trouble at all. Good luck!I think once I'm more confidant with it all I'd like to have it set up that way but my sump is pretty big (50") so, at least for now, space in there isn't an issue for me.
Going by this chart for my return pump I think it will be almost perfect for the flow you've helped me work out? Mine is the 9000 model.
Thanks for all your help with this Bruce, I really appreciate it!
That's a cool looking set up. Looks really slick. Will you have to sit the tank slightly out from the corner due to the sump position?