Durso or Stockman overflow?

[scubadude]

Just curious as to who uses what? I know that the durso has been around alot longer but the stockman seems to be more compact. I personally like the stockman because of this reason and although they both are good overflows I dont see the the durso mod being any better than the stockman? Would like to hear pros/cons from both sides though.

[Reefland]

I like the durso because pretty much, only basic plumbing skills are required to construct it. With the stockman you stuck drilling holes for water to drain through... Not that it's difficult to construct the Stockman but I think the Durso is easier.

[underseaworld]

Stockman or Durso? What are they?

[Reefland]

Standpipes that are used in internal and external overflows to keep them from sounding like a flushing toilet bowl...or worse!

[scubadude]

Stockman or Durso? What are they?

Sorry I should have posted the links

Durso Overflow
http://www.rl180reef.com/pages/standpipe/standpipe.htm

Stockman Overflow
http://www.rl180reef.com/pages/stand...n_stockman.htm

[underseaworld]

I just got my 300gl tank. This tank will go into my new home once it is built. It has two overflow boxes in it. The Durso stand pipe looks fairly easy to use. What is the purpose of the holes in the stockman pipe?
thanks

[scubadude]

What is the purpose of the holes in the stockman pipe?
thanks

If you are referring to the holes in the actuall pipe not the cap on the top (which I believe you are) then that is actually where the water drains down into the sump. Which this itself I see can be harder to construct the stockman but from what I have read the Durso remains the most popular because of its ease to construct, irregardless of its space constraints vs. the stockman

underseaworld
if you want I can try and show you a pic of one of my stockman pipes constructed with the holes?

[underseaworld]

Please do send pictures. I am a visual type of guy.... All the holes in the pipe what are they for? I am thinking they are for screening of the water to the sump so that snails and such do not go into the piping. Is this correct? Compared to the other pipe that just has the PVC large hole to drain the water. The end cap has a hole in it also what is that for?

If you are referring to the holes in the actuall pipe not the cap on the top (which I believe you are) then that is actually where the water drains down into the sump. Which this itself I see can be harder to construct the stockman but from what I have read the Durso remains the most popular because of its ease to construct, irregardless of its space constraints vs. the stockman

underseaworld
if you want I can try and show you a pic of one of my stockman pipes constructed with the holes?

[scubadude]

....All the holes in the pipe what are they for? I am thinking they are for screening of the water to the sump so that snails and such do not go into the piping. Is this correct? Compared to the other pipe that just has the PVC large hole to drain the water. The end cap has a hole in it also what is that for?

Ok heres some pics

As far as the holes in the pipe used for screening snails....I suppose you could use the holes for that purpose but my O-flow box has eggcrate with floss pad (floss gets changed periodically) and that is my screening for my snails to keep them out of the o-flow. I wanted the holes in the pipe in no way to be restricting flow so I made my holes pretty large as you can see...and they are not really holes....I used a dremel (i think) and cut large sections out you can see in the 3rd picture the holes in the pipe. The hole in the cap (first picture) is the vent to regulate the gurgling noise. I was fairly lucky and drilled the hole and dont need to put a valve on the airvent hole to regulate it....just have to probe it periodically for salt creep. HTH

[scubadude]

I suppose you could use the holes for that purpose

Let me re-iterate (sp?) on this .....actually it probably wouldnt be a good idea to use the holes as a screening for snails etc. Your asking for trouble IMO if your snails even get that far.

[underseaworld]

Looks good and thanks for the eggcrate idea. I will need to make these items for my new tank.

I will let you know what I am thinking of doing on the overflows to see what you may think.

I like the pictures. But I cannot quite figure out what is going on at the top of the pipe. Is this a pvc sleeve e/w end cap to go over top of the drain pipe to allow for water flow into the drain pipe? And did you then drill the top of the end cap? With what size of hole?

Let me re-iterate (sp?) on this .....actually it probably wouldnt be a good idea to use the holes as a screening for snails etc. Your asking for trouble IMO if your snails even get that far.

[underseaworld]

I thought I should send you picture with my questions.

Thanks.

Let me re-iterate (sp?) on this .....actually it probably wouldnt be a good idea to use the holes as a screening for snails etc. Your asking for trouble IMO if your snails even get that far.

[golfish]

I've only used the Stockman because of the 1.5" bulkheads and my overflows have always been 8" or less square...Never really had any issues with it until last a week or so ago when I bumped up the flow through the sump. I notice the level in the sump going up and down, same with the tank. I drilled out the cap on the top and added a ball valve, it helped but made pretty bad slurping noise. The fix was adding a new cap and drilling a much smaller hole.

[Ninong]

Just curious as to who uses what? I know that the durso has been around alot longer but the stockman seems to be more compact.

I went with a Stockman standpipe in my tank because I needed a large diameter standpipe and the Durso type street ell at the top would have been too huge to fit in my corner overflow compartment. My standpipe is 2" diameter and about 25" tall to accomodate my 27.5" tall tank with 1.5" drain bulkhead.

They both utilize the same concept: Submerged water intake with controlled air intake. The Stockman standpipe uses a coupling at the top instead of a street ell but they seem to operate about the same as far as I can tell.

[Ninong]

The fix was adding a new cap and drilling a much smaller hole.

Or you could have installed 1/4" OD tubing in your already enlarged hole in the top of the cap and fitted it with an air valve to control the air intake. (P.S. -- Looks like you already tried that.) Unless you're saying that your original coupling was too small???

(P.S. -- I just checked out Ken Stockman's website and it looks like he has modified his design somewhat from what it was a couple of years ago. He's now using a 3/8" vinyl tube coming out of the air-intake hole in the cap. Mine just has a small hole that is probably about 1/8" diameter but no tubing. That's the way Ltspd made it and he had made the same thing for himself previously.)

What I did with my Stockman to control the up-and-down effect, was to simply close the ball valve on the drain line from the tank just enough to cause a slight backup in the water inside the standpipe. I still have the same relatively small air-intake hole in the top of the coupling that Paul (Ltspd) drilled when he made it for me.

Every now and then I open the ball valve on the 1.5" drain line from the tank all the way and then if I'm not very careful to get it back exactly where it was before, I will have noise and sometimes even that nasty up-and-down business. Once I get the ball valve just right, it works like a charm and is totally quiet. I wish I could say the same for my miserable Little Giant pumps.

[Ninong]

With the stockman you stuck drilling holes for water to drain through...

Mine doesn't have "holes." It has a wide slot for water to drain through. And it has the slot on only one side of the pipe instead of both sides like Ken shows on his website. That's the way Ltspd made it. It works fine but maybe that's because I'm only pushing about 1,000 gph through it???

One thing that is a pain is that Nassarius snails and even some Ceriths manage to get through the eggcrate at the top of my I.A. designed overflow compartment and end up going through the drain and down into my sump. Do you have a problem with snails getting through your regular grate at the top of your overflow?

I saw a picture of a Durso standpipe that had one of those PVC slotted strainer sections as the submerged water intake and that looked interesting, except that in my case that might result in all of the snails ending up permanently inside my almost inaccessible corner overflow compartment. I have almost no access because of my built-in tank installation.

Here is the diagram from Ken's website:


Mine is built exactly like that diagram except that I don't have any tubing sticking out of the hole in the top, just a little air hole about 1/8" diameter. Ken says that in practice you should make two slots at the top of the pipe for water intake, one on either side to maximize water flow but Ltspd just made one in mine.

Ltspd made mine with the standpipe itself too long so that I could cut it myself to the exact height I needed. I decided to cut it so that the top of the cap was exactly flush with the top of the overflow grate. That worked out just fine when I decided that I needed to put a piece of white eggcrate over the top of my overflow compartment to keep my fairy wrasses out. I have a feeling I just sort of lucked out with mine thanks to being able to adjust the whole contraption by slightly closing the ball valve under the tank.

Picture of my corner overflow with white eggcrate in place:

[golfish]

Or you could have installed 1/4" OD tubing in your already enlarged hole in the top of the cap and fitted it with an air valve to control the air intake. (P.S. -- Looks like you already tried that.) Unless you're saying that your original coupling was too small???

yeah, I tred it, it didn't work as well...you'd think a hole is a hole but for some reason the valve made lots more noise, plus it didn't work as good.