wicked LOUD!!!! return noise! water slap galore!

[JohnK]

Bingo, main problem is that the holes in the top of the T's are WAY too big. There are probably several other things that can be done to reduce other noise, but that's where to start.

Usually the holes need to be about 1/8" or smaller. Those holes look giant and they are letting all the sloshing noise inside the pipe come blasting up and out.

Edit, adding; Quick test of the hole size, make plugs with chewing gum, plumbers putty, or even your thumbs, then insert something along the lines of those little tiny straw/coffee stirrers or any other tiny little tube through the plugs and see what happens

You'll also want to add "reverse durosos" of some sort. They will let the air vent out where the drains hit the sump. It's hard to explain until you try it, but they can make a big difference.

 

[new2saltyfish]

They were 1/16th and i made them around 1/8th and the noise was just as loud and the water level just as high so i was advised by another member to make them bigger but there hasn't been any difference between any of it. I'll have to try that...was thinking possibly duck tape with different sized holes as well.

So is a reverse durso just this in the sump?
http://i51.tinypic.com/2m7ssx3.jpg

 

[willray]

I agree with John those holes are huge and is IMO most of your noise.Going to need a lot of gum
The hole looks big enough that you might be able to rig a bushing with ID threads and be able to screw a pvc valve in....that way you can open/close the valve to get the correct mixture w/o drilling and plugging....etc.

 

[delta]

the gurgling is probably the holes being too big. if the durso is working right the water level should be in the middle of the pipe of the bulkhead.

do you have teeth on your overflow or is it just flat? I am wondering if it is flat and maybe the water from the side is making noise hit the water coming over the front?

I would have to concur on the holes being too big. start with a piece of tape and poke a small hole to see if that will help you sound issue. I do not think it will cure it 100% but it should help. The tape is a testing method not a solution you could tap or the hole or like wilray stated use a bushing and add a valve.

Also your drains are completely vertical. granted looks nice and neat but is not the best way to plumb a drain with a Durso.

 

[JohnK]

They were 1/16th and i made them around 1/8th and the noise was just as loud and the water level just as high so i was advised by another member to make them bigger but there hasn't been any difference between any of it. I'll have to try that...was thinking possibly duck tape with different sized holes as well.

So is a reverse durso just this in the sump?
http://i51.tinypic.com/2m7ssx3.jpg

Your flow is quite mild and split between two drains even those little 1/16" holes may have been too big insted of too small.

The pic you linked is a reverse duroso but probably not an ideal one. It's usually best if the drain pipe comes in at a 90 deg angle insted of 45, and it should come in right at the water level. Also the bigger the PVC size on the reverse duroso the better it will work. Just details really, using a 45 will work, but I'd want it closer to the water level and made of larger PVC parts.

Overall I suspect that there are several factors contributing to the noise and to get it to be fairly quiet will involve working out several kinks one at a time.

 

[gweston]

Try sticking 6" of regular old flexible airline hose into the holes in the top of the standpipes. It acts as sort of a silencer. Worth a try. It doesn't need to go into the hole that far, but the hose should seat well so that air is going in through the hose itself, not around it. It may help a bit. If the standpipe is suppose to be a siphon, then it shouldn't be drilled and have a airline hose hanging on it. If you have a siphon line, you could try to put a ball valve below near the sump, with the pvc terminating an inch or two below the water line. You can adjust the flow going through a siphon with the ball valve, which can help lessen noise too.


But... good to read up on the various drain styles and see how it compares to yours. I built a bean style overflow for my new 125 recently. I need to figure out how to tune it to quiet it down tonight ;P

 

[new2saltyfish]

Your flow is quite mild and split between two drains even those little 1/16" holes may have been too big insted of too small.

The pic you linked is a reverse duroso but probably not an ideal one. It's usually best if the drain pipe comes in at a 90 deg angle insted of 45, and it should come in right at the water level. Also the bigger the PVC size on the reverse duroso the better it will work. Just details really, using a 45 will work, but I'd want it closer to the water level and made of larger PVC parts.

Overall I suspect that there are several factors contributing to the noise and to get it to be fairly quiet will involve working out several kinks one at a time.

Anyway you could draw a picture of what you mean? I think i have an idea but i want to be sure before i start cutting and changing

 

[JohnK]

Here's 3 variations on the idea, none of these are set up pefectly but they all worked pretty well. Ideally each of these would sit a little lower in the water, and if the drain pipe came in at a right angles it would be better than the angles you see in the pic. (the smallest drain that's sort of in the middle doesn't have a cap on it only because it's only got a trickle flowing through it, but normally you would always use a cap with a small air hole)

 

[new2saltyfish]

o ok i see, awesome! That doesn't look like that'd be too hard to add to what i have. Should i add ball valves in the pipes or lead them straight to that reverse durso? SO with a 90 degree turn i should just make it go into the center hole of a T fitting, but a cap on the top with a TINY hole and have the pipe on the bottom go under the water correct? How low should i put them...T fitting touching water or how far above the water should the T fitting be? How far underneath the water surface in the sump should the pipes go? Seems easy enough to add on, and if that doesn't work i could always add the other stuff as well.