Best overflow plumbing for a reef ready 120

[smokinreefer]

Hey,

I'll be setting up a reef ready 120 tank that has 2 prebuilt overflows
and the standard 2 holes drilled on inside bottom of each overflow.

1 for drain and 1 smaller one for return in each overflow.

Would it be better to use both holes for the drain on each side?

I do not have a problem just plumbing the return over the top.
And I would prefer as quiet a drain as possible.

Please leave me your input!

[Proteus]

Why not use drains as intended with gate valve one for quiet operation and other as emergency

[spit.fire]

Originally Posted by Titus99

Why not use drains as intended with gate valve one for quiet operation and other as emergency

^^^ do a quick search on herbie overflows

[Proteus]

Originally Posted by spit.fire

^^^ do a quick search on herbie overflows

Yes I run a herbie.

Works great.

Although if he doesn't trickle down the emerg being seperate overflow the water could get nasty.

[smokinreefer]

Originally Posted by Titus99

Why not use drains as intended with gate valve one for quiet operation and other as emergency

Not sure what you mean?

So just put one drain and one return on each overflow?
Have one drain fully open as an emergency? And have a gate valve on the other return drain?

Would both drains from each overflow connect into a single drain going to sump?

Thanks.

[Proteus]

Originally Posted by smokinreefer

Not sure what you mean?

So just put one drain and one return on each overflow?
Have one drain fully open as an emergency? And have a gate valve on the other return drain?

Would both drains from each overflow connect into a single drain going to sump?

Thanks.

Yep you got it. Just make the emergency slightly higher so If main syphon plugs the water level will rise to go down emerg

And keep both seperate. If main syphon plugs then the emerg would also be plugged(if kept together)

[smokinreefer]

So with a 120,

I'd use 2 holes for return lines, 1 on each overflow.
1 drain on 1 overflow As an emergency line.

The other drain on other overflow will have gate valve.
This would be the only "working" drain? Is that right?
Unless of course something gets clogged,
then water would rise and go down the emergency line.

Would it be better to have one gated drain and one emergency drain in each overflow? And just run the returns over the top of the tank.
(Not using any holes for returns)

[Proteus]

Originally Posted by smokinreefer

So with a 120,

I'd use 2 holes for return lines, 1 on each overflow.
1 drain on 1 overflow As an emergency line.

The other drain on other overflow will have gate valve.
This would be the only "working" drain? Is that right?
Unless of course something gets clogged,
then water would rise and go down the emergency line.

Would it be better to have one gated drain and one emergency drain in each overflow? And just run the returns over the top of the tank.
(Not using any holes for returns)

Yes you got it.

You could do it with 2 main and 2 emergency. Your choice.

[George]

Are all 4 drains the same size? I know some RR tanks have different drain size in a tank which makes setting up Herbie a little difficult(not much but extra planning).

[Proteus]

No there diff. Prob 1" and 3/4"