how to reduce the noise of BM NAC6

smilodon · 02/08/2011, 11:18 PM

my nac6 is making a lot of noise,
but when I use a finger to block the air intake, the noise is gone.
Does anybody have the same issue as this?
I took it apart and assemble it together couple times, same problem.

williamjhitchcock · 02/09/2011, 02:44 AM

the deeper the skimmer is in the water the quieter it will sound. If you block the air it will be really quite but you need the air input for the skimmer to skim. Is the noise coming from the pump or the air tube? (my Nac7 is at 7 inches deep in the water and pretty loud)

smilodon · 02/09/2011, 11:43 AM

thanks for reply, I set up the wate level at different depth from 6" to 11", the same problem. The noise is not coming form the air tube, seems coming from the impeller breaking the air bubbles.

Paulairduck · 02/09/2011, 12:27 PM

try to find a air silencer, there are also some diy air silencencers that you can make. I will try and find a digram for you.

zangmann · 02/09/2011, 02:29 PM

Quote:

Originally Posted by williamjhitchcock

the deeper the skimmer is in the water the quieter it will sound. If you block the air it will be really quite but you need the air input for the skimmer to skim. Is the noise coming from the pump or the air tube? (my Nac7 is at 7 inches deep in the water and pretty loud)

Swap out to a needle wheel. I got a replacement for a broken mesh mod. Increased bubble production and quieter.

I assume the same goes for the NAC6, they use the same pump right?

OCScott · 03/02/2011, 11:10 PM

I also replaced a broken stock mesh wheel with a needle wheel. The mesh wheel broke shortly after firing it up for the first time. Make sure that the impeller is fully snapped into place, and/or not broken. It'll rattle if it's not completely in, as opposed to a hum. Mine took a couple of weeks to break-in. Once broken in, it is nearly silent. Good luck.

grabbit · 03/02/2011, 11:48 PM

Quote:

Originally Posted by OCScott

I also replaced a broken stock mesh wheel with a needle wheel. The mesh wheel broke shortly after firing it up for the first time. Make sure that the impeller is fully snapped into place, and/or not broken. It'll rattle if it's not completely in, as opposed to a hum. Mine took a couple of weeks to break-in. Once broken in, it is nearly silent. Good luck.

I am still hoping for my pin wheel to get silent on my Nac 7.. At this point it is still loud.. doing great job though.

Cliff · 03/02/2011, 11:56 PM

when the mesh wheel makes noise it is probably time to replace it. I just did that and the noise level dropped with new meshwheel. you could also try the needlewheel version, it is a bit louder than the meshwheel but it may last much longer. I run both on my nac skimmers.

langtudatinh01 · 03/11/2011, 11:34 PM

where can you get the needlewheel? thanks.

02/08/2011, 11:18 PM	#1
smilodon Registered Member Join Date: Jan 2009 Location: GTA, Canada Posts: 188	how to reduce the noise of BM NAC6 my nac6 is making a lot of noise, but when I use a finger to block the air intake, the noise is gone. Does anybody have the same issue as this? I took it apart and assemble it together couple times, same problem. __________________ Never say die, always say try... 25G Deep Blue Cube, Maxspect G2-110W extreme, Tunze DOC 9002, Koralia Nano 425 and 240, Apex aquacontroller.

02/09/2011, 11:43 AM	#3
smilodon Registered Member Join Date: Jan 2009 Location: GTA, Canada Posts: 188	thanks for reply, I set up the wate level at different depth from 6" to 11", the same problem. The noise is not coming form the air tube, seems coming from the impeller breaking the air bubbles. __________________ Never say die, always say try... 25G Deep Blue Cube, Maxspect G2-110W extreme, Tunze DOC 9002, Koralia Nano 425 and 240, Apex aquacontroller.

03/11/2011, 11:34 PM	#9
langtudatinh01 Registered Member Join Date: Jul 2009 Location: Fairbanks, Alaska Posts: 399	where can you get the needlewheel? thanks. __________________ Tuanito Tranito Current Tank Info: my little heaven: 40 Breeder nano reeftank (1 year old-refugium/sump 20 gallons)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Reduce the noise of Sunsun jvp 101	wemeetnet	Lighting, Filtration & Other Equipment	1	06/30/2011 03:12 PM
bm nac6 air intake is very loud?	zach jay	Lighting, Filtration & Other Equipment	0	09/23/2009 11:29 AM
please help me reduce loud noises from overflow box	khoivo1	New to the Hobby	8	04/30/2007 01:21 AM
Reducing skimmer noise	dendro982	Nano Reefs	4	02/12/2007 11:27 AM

02/09/2011, 02:44 AM	#2
williamjhitchcock Registered Member Join Date: Jun 2004 Location: Saint Petersburg Fl Posts: 205	the deeper the skimmer is in the water the quieter it will sound. If you block the air it will be really quite but you need the air input for the skimmer to skim. Is the noise coming from the pump or the air tube? (my Nac7 is at 7 inches deep in the water and pretty loud)

02/09/2011, 12:27 PM	#4
Paulairduck I LOVE FREE FRAGS!!! Join Date: Nov 2005 Location: Chino Hills Posts: 2,909	try to find a air silencer, there are also some diy air silencencers that you can make. I will try and find a digram for you.

03/02/2011, 11:10 PM	#6
OCScott Registered Member Join Date: Nov 2010 Posts: 17	I also replaced a broken stock mesh wheel with a needle wheel. The mesh wheel broke shortly after firing it up for the first time. Make sure that the impeller is fully snapped into place, and/or not broken. It'll rattle if it's not completely in, as opposed to a hum. Mine took a couple of weeks to break-in. Once broken in, it is nearly silent. Good luck.

03/02/2011, 11:56 PM	#8
Cliff Registered Member Join Date: Apr 2001 Location: Los Angeles, san gabriel valley Posts: 481	when the mesh wheel makes noise it is probably time to replace it. I just did that and the noise level dropped with new meshwheel. you could also try the needlewheel version, it is a bit louder than the meshwheel but it may last much longer. I run both on my nac skimmers.