Will this work as a durso?

[president89]

I'm plumbing a 40g breeder that is split in 5 compartments so space is limited. If I drill the hole in the cap, will this work as a durso? I'm not an expert so I thought I'd ask.

 

[uncleof6]

No...what exactly are you trying to do?

 

[president89]

This picture may help explain. It's for a broodstock system. The threaded section goes into my bulkhead, the cap faces upward, and the black piece is to keep my fish out of the drain.

 

[uncleof6]

The air vent should be over the point where the water heads down the drain... the physics of a durso is rather complex, and there is not really a siphon going on, so one would think this would not make a difference, however, the system will probably start sucking air too soon, at a lower flow rate, and sucking in air is undesirable with an open channel drain. Plus that pipe is awful small to be tyring to run it open channel smallest practical durso is 1.25". For a marine system, you are going to need an overflow in front of that either way...for surface skimming/surface renewal/gas exchange, and disolved organic processing by a "skimmer"

 

[Pdetevis]

use a street 90

 

[Pdetevis]

wait didn't really look at pic good, could you put the tee on the back side and 90 on the wet side?

 

[president89]

The air vent should be over the point where the water heads down the drain... the physics of a durso is rather complex, and there is not really a siphon going on, so one would think this would not make a difference, however, the system will probably start sucking air too soon, at a lower flow rate, and sucking in air is undesirable with an open channel drain. Plus that pipe is awful small to be tyring to run it open channel smallest practical durso is 1.25". For a marine system, you are going to need an overflow in front of that either way...for surface skimming/surface renewal/gas exchange, and disolved organic processing by a "skimmer"

This is a FO breeding system. Point taken about skimming. The air vent WILL be over the water line. I'm not sure what you mean about "open channel drain" - sorry for ignorance. Plus these are 8G chambers.. so I don't need huge flow.



This is an example of a durso standpipe. The only difference between this and mine is the curvature of the of 90 vs the straight upward flow of my T. that is my opinion, but I clearly don't understand the science. I was under the influence that the following was the point of a durso. Is the fact that this is a vertical standpipe my drain is horizontal the major factor here? I was under the impression that the fact that my point of entry for the water, was submerged, that I'd eliminate any gurgling noise.

No Durso - straight drain - will suck lots of air and water thus making lots of gurgling noise.

Durso - water is pushed upward into a pipe, thus eliminating air, and a small provision above the water line is made to allow some air into the pipe (assumed that was to eliminate a full siphon). I'm a complete NOOB, so please correct me in very small words.

wait didn't really look at pic good, could you put the tee on the back side and 90 on the wet side?

Everything behind the glass is glued in place.

 

[president89]

I tested out and sounds good. I can't be sure until I run all the compartments because right now I can hear the echo through the open bulkheads that don't have water yet.