Loud Overflow

[pterfloth]

Is the level in the overflow cycling up and down? If it is, the air hole may be too small. Mine plugged with salt a while ago and it was cycling and gurgling again. When I cleared the air hole, the gurgling disappeared.

I have installed a 90 facing downwards in my similarly sized overflow, fully submerged and the overflow is completely silent. Sounds like we have a similar setup.

Good luck, my tank is in my bedroom and has to be quiet.

[Aquattro]

fine, I'll come over and have a look

[e46er]

Originally Posted by Tyler Werbowski

My return pump is approximately 750gpm going through 1 inch spaflex to a simple u-shaped return to the tank.
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thats your problem right there 750 gal per minute is INSANE!!!!!!!!!!!!!!!

all joking aside check your air outlet that is a noise maker and also maybe post a pic of how the water enters your sump i found that putting a fitting on the pipe JUST before it enters the sump so its skimming across the top helped with the noise so it wasnt falling 4 feet straight into water

[msobon]

Since no one has mentioned it, is it possible to add another bulkhead in the overflow? Basically have one that is completely submerged underwater regulated by a ball valve so you get pretty much 99% of the water. The second which would be your existing durso (stand pipe etc) would only get approx 1% of the water (the excess from the submerged one) this would reduce the water to air mixture significantly making your overflow completely silent and allowing for tuning to desired flow as well safety of having the second overflow in case the main(submerged one) would get clogged etc.

I have this running on my system in my bedroom with two 1.5" pipes one submerged the other a durso, my water flow is virtually silent @ approx 1200 GPH, only thing you hear is the buzz from my calcium reactor pump.