Noisy Overflows - Help????

klesher · 05/13/2010, 07:27 PM

I just fired up a new 150 I have been working on for a few months. The overflows make a lot of noise and if it stays like this it will drive me insane.

I used (2) 1.5 inch bulkheads near the top of the tank. On the inside of the tank I installed an elbow with a strainer in each. The outside of the bulkhead connects to Y connector with a maggie muffler in each. After a short section of PVC I have a barb fitting into a hose that drains into my sump. I was told by my LFS to put a loop in the hose to reduce noise which I did?

Does anyone have any suggestions on how to reduce noise? Also where the hose enters the filter socks there is a lot of splashing noise which is a separate issue but one I need to address as well. Any ideas on how to reduce that noise too?

Thanks in advance

neelix · 05/13/2010, 07:37 PM

So no box all internal correct? If so you need to have a way of letting a regulated amount of air into your overflows a pipe with a cap with a small hole drilled like a durso except external. This would allow smooth water flow and cut the surging gurgling sounds.

For your sump a reverse durso will help.

RocketEngineer · 05/14/2010, 06:51 AM

klesher,
You want as straight a drain line as possible. If you do not have an internal overflow box, you will want an external Durso overflow which is an air/water type. You will have to introduce air at the top of the drain pipe to prevent the pipe from trying to form a siphon. The best situation would be to create a layer of water flowing down the inside of the pipe. Too much turbulence and the flow causes noise.

neelix is right, for the sump a reverse durso will allow the air out in such a manner as to minimize noise and microbubbles.

05/13/2010, 07:27 PM	#1
klesher Registered Member Join Date: Mar 2010 Location: Pittsburgh, PA (Center Twp.) Posts: 107	Noisy Overflows - Help???? I just fired up a new 150 I have been working on for a few months. The overflows make a lot of noise and if it stays like this it will drive me insane. I used (2) 1.5 inch bulkheads near the top of the tank. On the inside of the tank I installed an elbow with a strainer in each. The outside of the bulkhead connects to Y connector with a maggie muffler in each. After a short section of PVC I have a barb fitting into a hose that drains into my sump. I was told by my LFS to put a loop in the hose to reduce noise which I did? Does anyone have any suggestions on how to reduce noise? Also where the hose enters the filter socks there is a lot of splashing noise which is a separate issue but one I need to address as well. Any ideas on how to reduce that noise too? Thanks in advance

05/14/2010, 06:51 AM	#3
RocketEngineer Space is big. Join Date: Feb 2007 Location: Maryland Eastern Shore Posts: 3,226	klesher, You want as straight a drain line as possible. If you do not have an internal overflow box, you will want an external Durso overflow which is an air/water type. You will have to introduce air at the top of the drain pipe to prevent the pipe from trying to form a siphon. The best situation would be to create a layer of water flowing down the inside of the pipe. Too much turbulence and the flow causes noise. neelix is right, for the sump a reverse durso will allow the air out in such a manner as to minimize noise and microbubbles. __________________ -RocketEngineer "Knowledge is what you get when you read the directions, experience is what you get when you don't." - Unknown Current Tank Info: None Currently

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
noisy overflow	budhorse775	New to the Hobby	11	06/24/2006 01:28 AM
noisy overflow	bighead	New to the Hobby	4	04/08/2006 05:30 AM
Noisy overflow	QuickCarl	Lighting, Filtration & Other Equipment	2	03/25/2006 07:21 AM
Noisy overflow driving me nuts.	Secondgen	Lighting, Filtration & Other Equipment	10	01/21/2006 04:05 PM
Very noisy overflow	jhruppel	New to the Hobby	6	01/20/2006 10:58 AM

05/13/2010, 07:37 PM	#2
neelix Registered Member Join Date: Feb 2006 Location: Fitchburg, Mass Posts: 209	So no box all internal correct? If so you need to have a way of letting a regulated amount of air into your overflows a pipe with a cap with a small hole drilled like a durso except external. This would allow smooth water flow and cut the surging gurgling sounds. For your sump a reverse durso will help.