Brianemone Posted December 17, 2005 Report Share Posted December 17, 2005 my durso seems to make a huge amount of bubbles, does anyone have any idea on how to cut that down??? Quote Link to comment Share on other sites More sharing options...
slappers Posted December 17, 2005 Report Share Posted December 17, 2005 what about if you try the next size up in piping ???? just on the durso Quote Link to comment Share on other sites More sharing options...
Brianemone Posted December 17, 2005 Author Report Share Posted December 17, 2005 it already is using the size bigger than the hole (hole is 25mm and the standpipe is 32mm) Quote Link to comment Share on other sites More sharing options...
Brianemone Posted December 17, 2005 Author Report Share Posted December 17, 2005 does anyone else have a durso that goes straight down from the hole in the tank into the sump?? i think this might be part of the problem Quote Link to comment Share on other sites More sharing options...
slappers Posted December 17, 2005 Report Share Posted December 17, 2005 hmmm mine does but i dont have the bubbles you are getting its like an inside of a skimmer :lol: Quote Link to comment Share on other sites More sharing options...
suphew Posted December 17, 2005 Report Share Posted December 17, 2005 Read the durso web site, he talks about bubbles, they are normal. I have been playing round with cutting slots on the top of my outlet pipe just below the water line, it doesnt stop the bubbles but makes them exit the water a lot faster and cuts down on the noise from them. Quote Link to comment Share on other sites More sharing options...
slappers Posted December 17, 2005 Report Share Posted December 17, 2005 you have to see the amount off bubbles he getting its like a overflow and skimmer all in one Quote Link to comment Share on other sites More sharing options...
suphew Posted December 17, 2005 Report Share Posted December 17, 2005 I'm willing to bet money he doesnt have as many as I do! lol I have about 7000lph (pump is rated at 8000 at zero head) going through a standard 4 foot tank, stand pipe is 50mm top and 40mm bottom. with only 100-150 liters in sump it will empty in less than a minute if the overflow blocks! Quote Link to comment Share on other sites More sharing options...
slappers Posted December 17, 2005 Report Share Posted December 17, 2005 he might get some pics up tomorrow (once he cleans up his mess) Quote Link to comment Share on other sites More sharing options...
suphew Posted December 17, 2005 Report Share Posted December 17, 2005 kwl I need to get some up to, just gota get off my butt and set up a site Quote Link to comment Share on other sites More sharing options...
slappers Posted December 17, 2005 Report Share Posted December 17, 2005 thats what sundays are for Quote Link to comment Share on other sites More sharing options...
wasp Posted December 17, 2005 Report Share Posted December 17, 2005 Don't you adjust the airhole or something? Quote Link to comment Share on other sites More sharing options...
suphew Posted December 17, 2005 Report Share Posted December 17, 2005 Don't you adjust the airhole or something? The air hole is what lets the air in (duh, that even sounds stupid as I typed it), stops the pipe turning into a syphon, because of this some air goes down with the water, ending up as the bubbles at the bottom. If you have a syphon, you get the loud sucking sound. Quote Link to comment Share on other sites More sharing options...
lduncan Posted December 17, 2005 Report Share Posted December 17, 2005 Durso is not a great idea in my opinion. You're trying to control the amount and flow of air down the overflow to try and counter something which is cause by air in the first place. Intermittent siphon is where you get the really loud gargling, that the durso attempts to fix. A full siphon is silent, as it has no air flowing in the tube. In my opinion that is what you want. It is virtually self adjusting. You don't get anywhere near the amount of bubbles entering the sump. Of course you need some sort of backup if it blocks, but a Durso can block just as easily and cause just as much mess. Layton Quote Link to comment Share on other sites More sharing options...
Brianemone Posted December 17, 2005 Author Report Share Posted December 17, 2005 when i pulled out the old sump the bubbles had actually made a bit of skimmate on the walls :lol: i think for now i will just make a little nest of filter wool and egg crate. then i'll experiment with spraybars and bends etc Quote Link to comment Share on other sites More sharing options...
cracker Posted December 18, 2005 Report Share Posted December 18, 2005 Should have gone for a Cracker valve!!! Quote Link to comment Share on other sites More sharing options...
ghostface Posted December 18, 2005 Report Share Posted December 18, 2005 surely its just a cas of adjusting the air mix... maybe your return plumbing is too big for the volume of water travelling through it, making it necessary to draw more air so as not to syphon. all dursos i have heard are near silent. i hope the new one i have made is, havent filled tank yet Quote Link to comment Share on other sites More sharing options...
Ira Posted December 18, 2005 Report Share Posted December 18, 2005 Mine was bubbly at first, I mean big noisy bubbles. But after a little while it settled down and was just more of a foam, makes a quiet hissing noise that's totally drowned out by everything else in the tank. Quote Link to comment Share on other sites More sharing options...
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