Sump water noise

Cole.mormon · Dec 28, 2020

You could try a gate valve
Or maybe another elbow

dmy535 · Dec 28, 2020

daybreaksky said:
please do not put a gate valve on duroso overflow since there is probably no emergency drain. this is not how they work and you will flood your house

He can IF he has a controllable pump to match the flow rate.

daybreaksky · Dec 28, 2020

dmy535 said:
He can IF he has a controllable pump to match the flow rate.

Not often but pump controllers have been known to glitch and send max flow on power outages etc, herbie overflow that utilized a gate valve has an emergency drain to take up extra water. Even a dirty filter sock would impede flow and cause flow to be more restricted. The overflow they have here is designed to be a full siphon with unrestricted flow and the elbow on top is supposed to have a small hole that will let air in and break full siphon and muffle noise. The size of the hole dictates the noise level according to flow rate of the pump, the size of the tiny hole in a sense is the gate valve in this case. It can be controlled with airline tubing and an air valve.

Mikosreef · Dec 28, 2020

I agree with no vavle on drain line as it is durso.

The overflow also has intermittent full suction, maybe my flow rate from the return is too high....?

Sicce syncra 3 is rated 714 gph which is what i am running it at.

Anyone know?

Mikosreef · Dec 28, 2020

daybreaksky said:
is there a little hole on top of the elbow in the overflow? I can't tell and that is what controls the noise. if there is not, you need to redo it properly and this will help control the noise to minimum, if there is, here is a great thread that walks you through some tricks.
https://www.reef2reef.com/threads/s...ve-ways-to-quiet-a-durso-standpipe-is.323816/

Yes there is a drain hole to reduce the siphoning and i feel like it may be too restrictive/may need to be bigger.

If i clog it, the drain goes into a full suction and way more noise.

daybreaksky · Dec 28, 2020

on my 55 about 10 years ago instead of an elbow I used a T and the end sticking up had a pvc cap on it. the cap wasn't glued in but was fitted snugly with Teflon tape so that I could play with hole sizes and match the flow by making them different size and if I messed up I could just replace the cap without gutting the plumbing. what worked for me was drilling a 1/4" hole and adding a threaded barb fitting with a piece of airline and a simple air flow valve to dial in the air flow very precisely. it was pretty quiet, but not silent like herbie, the only thing I can hear on my tank is the fans of my lights.

Mikosreef · Dec 28, 2020

Update: i reduced my sicce syncra 3.0 flow to the minimum setting (290 gph) which drastically reduced the noise.

Less water pushing from main tank to sump (3x the main tank volume)

Its very quiet now.

Not ideal therefore i will most likely increase circulation in the main tank depending on how things go.

Scorchx1245 · Dec 28, 2020

glad you didnt add a gate valve to single overflow....if something goes down the drain line such as a snail shell, it will hit that valve and get stuck causing your drain to plug aka a flood...you return will pump more water then your drain can handle with the obstruction slowing down the drain.