Overflow & return gph

[BlueKoran91]

I have an eshopps overflow box rated at 200gph. My sump is roughly 3ft below the tank. Calculating the head loss...how many gph should the return be?


🐠Manda🐟

[klwheat]

not sure where you're headed with this question, but....less than 200 gph :shades:
Most of the pump manufactures have a graph or table on the box (or their website) listing the return flow at a given height, so you can just look at a few and pick one that stays where you want it. That being said, I tend to err on the side of cautious...and make up the difference with powerhead flow. Hope that makes sense...lol

[BlueKoran91]

not sure where you're headed with this question, but....less than 200 gph :shades:
Most of the pump manufactures have a graph or table on the box (or their website) listing the return flow at a given height, so you can just look at a few and pick one that stays where you want it. That being said, I tend to err on the side of cautious...and make up the difference with powerhead flow. Hope that makes sense...lol

Makes sense. I think I've found one that will work. Hopefully I'll be picking it up today. Thanks :)


🐠Manda🐟

[klwheat]

What did you end up deciding on?

[BlueKoran91]

From what I can tell a mag 2 would work. I think a rio1100 would be pushing it too close


🐠Manda🐟

[klwheat]

That sounds about right. I wouldn't go any higher than that, just in case you had even a small impingement on the overflow's flow.

[BlueKoran91]

That sounds about right. I wouldn't go any higher than that, just in case you had even a small impingement on the overflow's flow.

My thing is the flow. I want some in the tank lol


🐠Manda🐟

[rrasco]

I'd go with PHs for in-tank flow and just use the return for what it was intended, to return water from the sump.

[klwheat]

I'd go with PHs for in-tank flow and just use the return for what it was intended, to return water from the sump.
Yep...that. :-)