Noisy drain

[luapinicap]

Hey everyone

I was hoping someone could answer this question. I recently plumbed my first tank and did a leak test yesterday. I have a bean animal style drain in my overflow box. On my full syphon line I have a gate valve. This is a innovative marine ext that came with 1 in drain bulk heads. I kept 1 inch pipe all the way to my filter roller.

my issue is that my full syphon line is noisy. The only thing I can think of is that I’m closing the gate valve to alter the water height, and I don’t have one inch of water going through the pipe causing it to be noisy. Is that a thing? I didn’t think a gate valve would affect the noise in the pipe. Is there anything else I am missing that could cause this?

any help would be appreciated, I really would like a silent tank.

 

[KStatefan]

Where is the noise coming from? A full siphon should be silent. Is the discharge submerged about an inch?

 

[luapinicap]

Where is the noise coming from? A full siphon should be silent. Is the discharge submerged about an inch?

Yea that’s what I thought. Yea I have ran it with the discharge submerged way beyond am inch. There’s also air bubbles coming out which I don’t know why I am getting those either

 

[KStatefan]

Yea that’s what I thought. Yea I have ran it with the discharge submerged way beyond am inch. There’s also air bubbles coming out which I don’t know why I am getting those either

Is it sucking air from the overflow? With the discharge submersed more then an inch it can be difficult for the air to get purged out.

 

[exnisstech]

Try sticking a piece of air tube into the downflow pipe. I'm no overflow expert by any stretch of the imagination but I did that on my overflows and it helped. I had to experiment with how far down to insert it then secure it some how but it helped reduce the noise.