Will this plumbing idea work?On a 210 and 220?

[wlucks]

I have decided to plumb both to 210 and 220 tanks together. I have a bashsea 60” sump and am if I should plummets with two drain lines in to return lines or one drain line and one return line each tank?Yellow lines would be drains and Red would be returns

 

[laverda]

I would keep drains separate. Make sure you sump can handle the water from both tanks in a power outage.

 

[wlucks]

I would keep drains separate. Make sure you sump can handle the water from both tanks in a power outage.

So you would do one side of the tanks as returns in one side as the Drains? Using the height and water volume and estimating 10 gallons on the high side for an inch of water per tank when it drains

 

[laverda]

If you have 2 overflows in each tank, I would use all 4 as drain lines. Redundancy gives you protection if one gets a snail in it or something.

 

[wlucks]

If you have 2 overflows in each tank, I would use all 4 as drain lines. Redundancy gives you protection if one gets a snail in it or something.

I’m just wondering if I’m gonna be able to return enough water to replace what is draining if I use All four as drains

 

[laverda]

Yes and then some, depending on your return pump flow rate.

 

[DCR]

What holes (number and size) are pre-drilled in those overflow boxes?

 

[Gtinnel]

I’m just wondering if I’m gonna be able to return enough water to replace what is draining if I use All four as drains

Remember that it is your return pump that sets how much flow there is through the drains. I agree that two drains for each tank is a better idea, so that if one would plug somehow you have a backup.

The return pump doesn't have to keep up with the drain, its the drain that has to keep up with the return pump.