any way to quite down the drain in my overflow???

[pilot_bell777]

RR tank, pipe rising in the overflow....anyway to quite it down like drill a hole in the side of it or something?

[cpreefguy]

durso standpipe
http://www.dursostandpipes.com/

[pilot_bell777]

Is that going to restrict flow in anyway?

Does it need the piece going up after the elbows or could it just be two 90s on the top of the drain pipe?

[cpreefguy]

there is a link on the page on how to make them. they wont restrict flow, only noise :P

[hobogato]

just be sure that the standpipe you use is a little bigger than the opening on your bulkhead. for example, if your bulkhead is 1 inch, then use 1.25 inch for your durso. i have some that i made on my 240, and with the canopy closed, you cant even tell the water is moving, and i am pushing about 1200 gph through each overflow. you may have to play with the diameter of the antisyphon hole in the top cap to get it to work just right.

[hobogato]

forgot this - dont glue any of the parts of the durso together, not necessary and makes it harder to clean.

[witecap4u]

It doesnt have to be larger than the opening, just recomended for some reason. My bulkheads are 1" and the durso are also 1" and they work fine. You'll also want thetop cap on there, so use a T and a 90.

As for the hole on the top, you can drill a 1/4" hole through the side of the cap/pvc and rotate it so its basically adjustable. The size of the hole will determine the amount of air going in and inturn will determine the water height in the overflow chamber. If there is no air, you will eventually create a syphon untill the water level gets below the "J" on the durso and then it will make a loud sucking sound. If your hole is too big, you hear a gurgle sound and the water level will be above the "J" part of the durso. The ideal water level is about 1/2" up the "J" on the durso.

cs

[gjuarez]

Does anybody have a picture of a durso?

[::pete::]

one (http://www.rl180reef.com/pages/standpipe/standpipe-ken_stockman.htm)

two (http://richpoorman.com/aquaria/diy/standpipe.htm)

three (http://ozreef.org/content/view/141/29/)

four (http://www.dursostandpipes.com/)

five (http://www.stickycricket.com/aquarium/equipment/)

[brewercm]

I ended up wire tying some eggcrate to each of mine on the inlets. Two times I had a mexican turbo snail crawl over my overflows and into the inlets clogging it. Luckily my return flow was low enough that the second one was flowing enough. Had there not been a second it could have been an ugly site.

[gjuarez]

Cool. Thanks Pete. So basically its just a T and a 90 with an endcap with a hole in the top? Is there anything that I should watch for?

[::pete::]

snails ...

[Alamo]

I bought one from Alamo Aquatics that Dan mfg's for them, if you dont feel like making one yourself.

[pilot_bell777]

I made one tonight and it works GREAT!!!!! No more flushing!!!! LOL

[Alamo]

Its amazing the diff that those suckers make.

[gjuarez]

Jason, I bought all the materials to make my durso. Did you drill any holes on the side like witecap4u mentioned or did you just drill a hole on the top end cap? Did you drill a hole on both? WHat size of hole? I will be pushing about 500 gallons per hour. WHat do you think?

[hobogato]

mine dont have any holes in the side. im pushing about 2500 gph thru two overflows. each of my dursos has a 1/4 " hole in the top cap. i used 2" pvc on mine because of the amount of water going thru.

[gjuarez]

Okay, I went ahead and made a durso standpipe and for some reason the drain in not keeping up with the return. I made the standard durso with a T and a 90 degree elbow with and endcap on top. I made a 1/8 hole on top and noticed that it wasnt keeping up with the return, so then I made it 1/4 and nothing changed. Did I miss something?
Jerry

[bigdscobra]

If the holes are on the sides, eathier drill more or use a saw to cut slits. Jerry if you can try and take off the end cap. That should alow more air or make a bigger hole on the end cap.

[pilot_bell777]

Did you use the larger pipe going reducing down to a smaller pipe like the web site says?

[gjuarez]

Nope I didnt, so I guess thats the problem huh?

[hobogato]

just be sure that the standpipe you use is a little bigger than the opening on your bulkhead. for example, if your bulkhead is 1 inch, then use 1.25 inch for your durso.

that would be my guess. ;)

[pilot_bell777]

very well could be....I read some people saying it doesn't matter and some that says it does.

I personally have a larger pump than needed and have it turned down a little for my SCWD so the same size pipe and bulkhead is working fine for me.

Might try it though.

[ratboy]

I have a similar standpipe design that I think is better than a durso but works on the same principles. Just like a durso the pipe must be larger than the drain size. At the top of the pipe drill holes and /or cut slashes in the pipe all the way to about 3 " below the top of the pipe (rem you can always drill more holes!). I added a screw in fitting as well to give more adjustablility. Buy a oversized cap (I use a 4" cap in my 400 gal and 3" in my 40 gal) and place it over the pipe, it should be oversized by at least 1/2" on each side. I added more pipe to the cap to extend the spot where water was taken in to reduce bubbles being drawn in and sump noise below. Also Drill a hole in the top just like a durso to prevent "flushing". The reason I cam eup with this is that I couldnt fit a street el in my 40 gal overflow box. This design is more compact and it takes much more than a snail to affect let alone block flow. My explanation makes it seem much more complex than it really is but I think pictures may help...

-Erik