chimera Posted October 20, 2005 Report Share Posted October 20, 2005 arhhh i see what you're saying now suphew, either wasnt worded right in the first post or i cant read properly makes sense but only if water flow is changed - restricted or increased. the biggest issue with the design is the stainless "silencers". at least with a durso, chances are the crap that gets in the overflow will get sucked down it rather than block against it. i may still consider building in a redundant bulkhead near the top of my overflow that joins up to the existing plumbing. purely for the fact that water on carpet = more expensive than cost of bulkhead. durso = 40mm, to 32mm bulkhead, then back to 40mm pipe. there would have to be something pretty decent size (blue tang? ) to block a 32mm hole but thats where the smallest restriction is. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 Go back a few posts. If you have a DURSO...you have a hole. Therefore you have an air injection zone, therefore you have noise. My system has NO noise. NO NOISE. The spare residual overflow will take a hell of lot of extra water if required. I have it set up in such a way the I can pull the whole 32mm unit out of the bulkhead if I am to go away for holidays, thus back to full exit from the 32mm overflow with no restrictions. Suphew, i am not even talking about a DuRSO here. I have gone past that. If you like your durso, you keep using it. If you saw my system in operation you would see how safe it is. I want NO noise, i live in the country and 8000LPH will make a shitload of noise if not done correctly. I messed with the DURSO system for about 6 hours before realising I could not acheive what I WANTED WITH IT. sO i SIMPLY CREATED A BETTER SYSTEM. Even this may be "Bettered" yet. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 The tap is needed in the overflow as I cannot reach it coz of the TV! The top overflow returns to the SUMP. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 the biggest issue with the design is the stainless "silencers". at least with a durso, chances are the crap that gets in the overflow will get sucked down it rather than block against it. They are not for silencing chim...they are to stop fish going down the Plug'ole" if they jump over the fence!! Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 Maybe before you all give it shit, you should come and witness the system first. It is extremely stable and resilient to small changes and self levels also. A slight blockage on the stainless mesh does nothing to the level. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 Happy plumbing!! Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 Yeah I dont follow, why all the extra stuff when you can just have a durso? Does anyone else have any noise problems with their dursos? Extra stuff would be secondary overflow system......sounds sensible to me, as any pipework has the ability to block and cause issues. Even the famous DURSO!! Therefore a secondary would be well worth its weight consideriung the price of floor coverings. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 Said my bit!! Quote Link to comment Share on other sites More sharing options...
chimera Posted October 20, 2005 Report Share Posted October 20, 2005 They are not for silencing chim...they are to stop fish going down the Plug'ole" if they jump over the fence!! thats not how it should be designed. you have your overflow comb and a "lid" on top to stop fish getting in their in the first place so you'd never have that worry. i guess that then throws my redundant bulkhead idea out the window - i will never get anything large enough into the overflow because its limited by the overflow comb. snails and algae can grow in the overflow, but not up to 32mm in diameter!!! however, I still dont think it will hurt doing the extra bulkhead, its only about $40 in plumbing just incase Quote Link to comment Share on other sites More sharing options...
suphew Posted October 20, 2005 Report Share Posted October 20, 2005 Firstly lets put the durso noise thing to rest, THEY ARE SILENT, that is the whole point of them, silence AND safey. Tuning requires some time, yes more than six hours, because they need to find their balance, once you get close to the balance point it can take days to settle. Now lets put the whole durso thing aside, I agree your system would be quite, it is also very simple, so of all the many tanks in the world why doesn't anyone else do it??? Durso aren't the answer to every thing I have seen other over flow designs (SteveA for one), but they all have 1 thing in common, none of them restrict the water flow and all allow for far more flow than they would ever need. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 They are not COMPLETELY silent suphew. I have played with it for hours. They are quiet enough for most I would guess, however I wanted nothing at all and thats what I have. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 ......... simple, so of all the many tanks in the world why doesn't anyone else do it??? Coz they didnt think of it. Quote Link to comment Share on other sites More sharing options...
chimera Posted October 20, 2005 Report Share Posted October 20, 2005 THEY ARE SILENT durso are silent, but not completely silent. there maybe better options around. Quote Link to comment Share on other sites More sharing options...
lduncan Posted October 20, 2005 Report Share Posted October 20, 2005 Coz they didnt think of it. I did :-D. I know what you're talking about cracker. Air mixed with water will not give a totally silent result, unless you have some freaky laminar flow happening. Fill the overflow pipe with water and no air, and you'll get a silent overflow. It can be made to be self regulating too, based on head height, pressure and velocity. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 Thank $%^# someone knows what Im on about! Quote Link to comment Share on other sites More sharing options...
Ira Posted October 20, 2005 Report Share Posted October 20, 2005 The air valves on my durso are FAR from silent. Someday I'll get around to trying something else... Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 If you need a hand Ira...giz a shout. Quote Link to comment Share on other sites More sharing options...
Ira Posted October 20, 2005 Report Share Posted October 20, 2005 What I need is 4 day weekends every week. Give me time to do this kinda stuff. Quote Link to comment Share on other sites More sharing options...
cracker Posted October 20, 2005 Report Share Posted October 20, 2005 I just keep going to the early hours til its done... :-? Quote Link to comment Share on other sites More sharing options...
Ira Posted October 20, 2005 Report Share Posted October 20, 2005 Early hours being 5pm when all the shops close so I can't get what I need. Stupid useless NZ businesses. Quote Link to comment Share on other sites More sharing options...
Feelers Posted October 20, 2005 Report Share Posted October 20, 2005 And whats with banks ? 4:00pm, what the hell? Quote Link to comment Share on other sites More sharing options...
wasp Posted October 20, 2005 Report Share Posted October 20, 2005 Maybe before you all give it shit, you should come and witness the system first. Yikes! Well I went and had a look tonight, course I know stuff all about plumbing but could see how it works. I can see what Suphew is saying it could in theory block. However as a test Craig put some bits of paper over the stainless outlet filter, and had to block probably 80% of it before there was any effect, so there is a lot of spare capacity. Of course if it completely blocked (unlikely, but I guess we have to consider everything), the water would rise in the overflow box and then the secondary overflow will come into action. The secondary is unlikely to block as there is no reduction anywhere it is straight through. However it is not big enough to handle all the flow, but then the chances of the primary outlet becoming totally blocked are small, a partial blockage will be more likely. I'd see it in practical terms as 99.99% fullproof, I guess the only way to achieve 100%, even for a durso, would be to have a cut out switch to the main return pump, if the water in the main went over some particular level. Anyhow I think I've learned more about plumbing over the last few days than I even wanted to But hey, the fish just love the tank it is big enough that they behave totally naturally, a pleasure to watch. The tank is extremely open, and the fish tend to hang around the rock "island" on the left of the tank, exactly as you see them hanging around rocks and reefs while diving. I am sure they are as happy as in the wild, or likely happier due to the lack of predation, and reliable food supply. Quote Link to comment Share on other sites More sharing options...
Brianemone Posted November 6, 2005 Author Report Share Posted November 6, 2005 so anyway, trying to get the durso silent. obviously the amount of water going through makes a difference in the performance. the question i have is how much would be optimal for a 25mm hole with the 32mm stand pipe? and does more air or less air make it quite??? Quote Link to comment Share on other sites More sharing options...
cracker Posted November 7, 2005 Report Share Posted November 7, 2005 my advice is to not use a durso and use the valve system i am using if you want complete silence. i run a "Matching valve" and a "Tuning valve", (In one apparatus). works very well, takes up not much room and is 100% quiet. need to drill holes in tank first before filling tank though. Quote Link to comment Share on other sites More sharing options...
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