How does this filtration work ?

[427HISS]

Drain, safety, emergency, open, full, siphon ?

 

[Hemmdog]

yup

 

[427HISS]

Yup ?

 

[Silent]

Bean animal with 2 return lines

 

[Feet4Fish]

Bean animal agreed. Ideally the gait valve would be further down and closer to the sump

 

[427HISS]

But just how, does it work ?

 

[Peace River]

But just how, does it work ?

This link might help (scroll down to the bean animal section):

Overflow Boxes and Drain Styles - Durso, Herbie, and Bean Animal

Decide which of the three most common types of drains and overflow boxes is right for you and your tank.

blog.marinedepot.com

 

[Potatohead]

But just how, does it work ?

Siphon is the normal drain that goes from overflow to sump
Open channel has about 5% of the drain water draining through it
Emergency is just open and there in case the other two drains fail/clog

This is a standard beananimal setup

Returns are the water going back to the tank from the sump. There are two of them in this case.

 

[427HISS]

Ok, except for,...Open channel has about 5% of the drain water draining through it ?

 

[Feet4Fish]

Think of a Herbie with an emergency drain

 

[Potatohead]

Ok, except for,...Open channel has about 5% of the drain water draining through it ?

Yes

This is what maintains your water level properly in the overflow. Naturally due to various reasons the level of water in the overflow will move up and down an inch or so over time. This is a bit annoying and can cause some noise. By allowing a bit of water to trickle through the second pipe you now have a buffer zone - Instead of the level in the overflow rising and falling, the amount of water that drains through the pipe will change slightly instead.

 

[427HISS]

There we go, that makes sense. Thank you !