help with quieting down GH overflow...sounds like a train.

Devaji108

Devaji108

New member
Hey all,
OK tank specs:
40br with drilled GH 700 GPH overflow kit.1/5" pipes
only 1 union and 2- 45's going to sump.
running around 400 GPH through sump and tank .

overflow is very nosy. lots of air bubbles and a chucking noise so I guess there is not a full siphon. it the nosiest tank I have ever set up.

any thoughts on how to quite it down?

cheers
:beer:
 
With my 60 gal DT and 60 gal sump, my pump was too slow to pump the water into the DT so when the water got into the overflow box, the water was immediately dumped into the sump so there was never a siphon. I closed the valve about 1/4 of the way and now the water stays in the pvc all the time for a siphon. Try closing the valve a bit.
 
hmmm intrusting thought, however i did not add any gate or ball values to the plumbing.
GH recommends very simple plumbing.

one thing that they did say was once the bulk head was in the tank to trim it down so only I think a 1/4 was sticking out. I did not do this. did any of you guy do this step??
 
Just to clarify things ... Glass Holes overflows are not meant to have a full siphon ... that would be a disaster waiting to happen if you aimed for a full siphon with just one drain pipe.

Thanks,
Harry
 
oh, ok well thanks for correcting my terminology, that said it so loud it crazy.
I am getting both a water flowing and chugging noise.

from the videos I watched on youtube it seam like mine is 2X or more as noisy.

I did take a video with my phone just not sure how to UP load it now..
 
Harry Muscle said:
Just to clarify things ... Glass Holes overflows are not meant to have a full siphon ... that would be a disaster waiting to happen if you aimed for a full siphon with just one drain pipe.

Thanks,
Harry
Click to expand...

I'm in a similar situation for my frag tank. Single overflow with a single return. I've raised my overflow tube so it's near the top and I've exchanged it with a tube with a top in the middle of the overflow and I've removed the overflow tube all together. None of it matters. Water flows down with a very loud drain slurp and when it hits the sump below it sounds like a waterfall. My lower tube is fed about an inch or two below the water line.

I was looking online for a solution and thought of putting a gate valve on the lower overflow tube. I believe this would in effect create a siphon. A similar setup to a herbie. Why would I not want to create a siphon with a single drain?
 
Do you guys have the drain pipes below the water line in the sump? I have mine cut at an angle starting right near the water line and while it's not silent it's not that noisy, and I have my tank a few feet off to the side of my TV with only a screen top (ie no glass tops or canopy to block the noise.)

I run filter socks as well, and the drains definitely make more noise when the filter socks start to raise the water level up the drain pipes.
 
yeah mine is about 6-8 inches below the water line. no filter sock
I get the waterfall noise from the overflow box and slurping gurgling noise from the pipe.
defiantly air in the pipe and rumbling water?
 
Yeah then you're getting air trapped in the drain pipe at the sump.

It's difficult to get an actual pic of mine, so here's a quick paint pic of what I mean. This allows the air to escape rather easily while keeping the water splashing sound in the sump to a minimum.
Drain_zpsrajjllym.jpg
 
So I shortened the drain pipe in overflow a bit so it could be submerged and then I put a gate valve on the drain pipe going into the sump. It's now quiet as a baby. Just like my herbie on my DT, it just doesn't have an emergency drain. Considering it has only one drain regardless, complete blockage of that drain is a problem.

I'm convinced the gate valve is the correct method. The loudest thing now is the DC pump.
 
hey John glad you got yours dialed in.
i'll see if I have time to shorten the pipe going in to the sump and see if that help!
about how much should the pipe in the water 2"?
 
Devaji108 said:
hey John glad you got yours dialed in.
i'll see if I have time to shorten the pipe going in to the sump and see if that help!
about how much should the pipe in the water 2"?
Click to expand...

The more distance below from where the water comes over the overflow the louder the trickle will be unless the drain pipe in the overflow is submerged. This is how it's done with a herbie. To submerge the drain pipe you need to use the gate valve to control the amount of flow coming from the DT to the sump. Once you slow that flow the water level should rise just above the drain pipe, become silent and the waterfall in the sump quiets down as well.

See this for an explanation keeping in mind we only have 1 drain.

http://gmacreef.com/herbie-overflow-reef-tank-plumbing-method-basics/
 
thanks for the link.
I'll have to take a look at it later. but I am thinking my GH overflow hole to sump would be underwater as it's pretty low in the box, but maybe not.

how much did you have to turn down your flow with the gate?
 
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