Specific questions about Herbie style overflow

[MGoers]

Hey guys,

Couple more questions before I get going on this build. I want to run a Herbie system, and I want it to be as silent as possible. I have two 1" bulkheads. That being said:

1. Do I want to run the stock overflow as the backup, or would a traditional Durso be more quiet. I know this one in theory shouldn't see much water, but it might depending on how overkill my return pump is. I figure that the Durso will probably be more quiet since there is only one spot each for air/water to enter. An example of each included below.

2. Durso explains on his website that when building a standpipe with a 1" bulkhead you should neck it up to 1.25" pipe. My question is that, for the primary full siphon drain, should I still do this or just leave it 1" pipe?


Again, looking for the most quiet solution here. What do you think?

Included:

Stolen from Durso directly:

 

[byronious]

Following along. My drain pipes look like the 1st picture without the hole at the top with the clear tube. How far down does this clear tube go? Would it make my drains quieter if I drilled mine and added them?

 

[o-t-c]

I used just a straight piece of pvc as the backup drain. A durso should work fine if you are expecting that drain to see water. Mine doesn't unless I need to adjust the primary drain ball valve, which isn't very often.

 

[o-t-c]

And on your durso sizing question, they don't usually work right unless you upsize. Use the 1.25" and do it properly if you're going to do a durso.

 

[mc-cro]

I used the Herbie style drain for years, on several tanks.

On the full siphon, you dont need to step it down. I just used a strainer right on top of the bulkhead, no pipe at all. I used a gate valve on the siphon line to raise the water level in the tank up to the durso, and then the durso just barely had a trickle.

you do want to use the step up in sizing on the durso pipe, just incase it does ever need to go into full use mode because of a blockage on the siphon side.


edit, why have you drilled holes in the side of the durso? I would think that eliminates the whole design of having the intake submerged for quit flow

 

[o-t-c]

I also use just a bulkhead on the primary drain. No standpipe at all.

 

[MGoers]

But for those only using a strainer, when your system turns off that means the whole overflow is draining into the sump? Seems like that isn't necessarily optimal. I guess it wouldn't matter if there was enough room down there...

 

[MGoers]

I used the Herbie style drain for years, on several tanks.

On the full siphon, you dont need to step it down. I just used a strainer right on top of the bulkhead, no pipe at all. I used a gate valve on the siphon line to raise the water level in the tank up to the durso, and then the durso just barely had a trickle.

you do want to use the step up in sizing on the durso pipe, just incase it does ever need to go into full use mode because of a blockage on the siphon side.


edit, why have you drilled holes in the side of the durso? I would think that eliminates the whole design of having the intake submerged for quit flow

Just caught this part, the overflow came that way from the factory, hence my question.

 

[o-t-c]

Yes, my whole overflow drains to the sump when power goes off. I have the space for it. If its a problem, you can definitely use a stand pipe. You just have less height to play with when you adjust the valve.