How did you plumb your overflow boxes?

[Sailfin11]

I wanted to see what everyone has done for their side drilled overflows to make them silent. I going to be using overflow box that is siliconed to the side of my tank and haven't found a consensus on the best way to plumb these. Can you share pictures of your setup? Below is a similar overflow box to what I am using and a digital sketch of plumbing I am thinking of using.

 

[Urtoo]

bean animal setup. Silent
Only thing needed it patience and a good Gate Valve.
https://www.bulkreefsupply.com/spea...MI3pW2z7Pw5gIVjYbACh175QSeEAQYAiABEgIbfvD_BwE

 

[Sailfin11]

bean animal setup. Silent
Only thing needed it patience and a good Gate Valve.
https://www.bulkreefsupply.com/spea...MI3pW2z7Pw5gIVjYbACh175QSeEAQYAiABEgIbfvD_BwE

Thanks for the idea, but I think the problem is that there is no rear chamber outside of the tank like with the Shadow and Eshopps overflow kits.

 

[mfinn]

how many holes?
If 2, I might try and do some sort of hybrid herbie, with the full siphon 90 facing down and the emergency drain facing up.
If 3, try a modified hybrid bean some how.

Tough to judge without seeing it in person.

 

[shamrock]

pictures would help ?

 

[manderx]

here's a silent herbie-inspired drain off a single hole in the back with no external box that i ran for 12+ years with no problems whatsoever.

the yellow circle is the drain bulkhead. blue lines are water draining down to sump. red line is return. green dot is a vent hole.

the water wants to go straight down the line with the gate valve. gate valve is set to act as a balanced full siphon, just open enough for 99-100% the water and no air. the remaining 1% (if any) backs up and goes up and over then down, just like the second line on a herbie.

rotating the whole assembly sets the water level inside the overflow box. you want it high enough to fully submerge the bulkhead. the bulkhead opening inside my overflow box was close enough to the box wall that i didn't have to worry about anything clogging the inside hole. depending on yours, might need a strainer or gutter-guard since it's a single point that could clog.

 

[Sailfin11]

here's a silent herbie-inspired drain off a single hole in the back with no external box that i ran for 12+ years with no problems whatsoever.

the yellow circle is the drain bulkhead. blue lines are water draining down to sump. red line is return. green dot is a vent hole.

the water wants to go straight down the line with the gate valve. gate valve is set to act as a balanced full siphon, just open enough for 99-100% the water and no air. the remaining 1% (if any) backs up and goes up and over then down, just like the second line on a herbie.

rotating the whole assembly sets the water level inside the overflow box. you want it high enough to fully submerge the bulkhead. the bulkhead opening inside my overflow box was close enough to the box wall that i didn't have to worry about anything clogging the inside hole. depending on yours, might need a strainer or gutter-guard since it's a single point that could clog.

Thank you so much! This is a cool idea that I have not seen before :)