Gurgling & sucking noise by the sump. Help

[arowana718]

Hi all,

I have a 360g with dual internal Durso overflows. The drain is 1.5" and output is 3/4." The 1.5" drain has an 90 degree elbow after Bulkhead into clear tubing. Then goes to plastic desk drawers for filtration. See pic and vid.

I see so much air and bubbles inside the clear tubing. Making loud gurgling and sucking noise right before sump. Like a constant toilet flush. I search this site also and tried some methods to no avail.

I tried putting airline hose into then air vent on the durso elbow. Adjusting it up and down. Even adjust air valve. Makes it worst bc the internal overflows makes sucking noise.

Do you do think putting a ball valve on the drain will help? This will reduce the gph

 

[Justanano]

It looks like air is getting trapped in the low spots of the flexible tube... makecit a straight line on a downward angle...

 

[arowana718]

It looks like air is getting trapped in the low spots of the flexible tube... makecit a straight line on a downward angle...

Tried that. Doesn't work. ***

 

[Justanano]

Thank I would either slow down the flow or increase pipe size

 

[Brad Drollinger]

Are you able to adjust your flow on the main circulation pump? Or does it have just one speed?

 

[arowana718]

Thank I would either slow down the flow or increase pipe size

Do u think a ball valve would work?

 

[Justanano]

Yes

 

[Brad Drollinger]

If the main circulation pump is not variable speed, you can install a ball valve on the return side going back into the aquarium. Try adjusting the flow with the ball valve and see if this helps with the noise.

One of the gauges you can use is adjust the flow so that the water level in the aquarium is flowing back into the overflow boxes at a height of about 1/3 - 1/2 the way up on the over flow slots or vents without the water rising in the overflow box so high that it begins to flow into the vented hole in the top.

Try adjusting the Durso pipe so the vented hole on top is about 1" from the top of the aquarium or glass lid. Be sure the vent is open and clear of any obstructions.

You may find that using schedule 40 pvc piping is better than the flexible tubing to help eliminate water surges and noise.

There are different ways to drain the water into your sump that can eliminate noise, depending on the type of sump you are using.

 

[arowana718]

If the main circulation pump is not variable speed, you can install a ball valve on the return side going back into the aquarium. Try adjusting the flow with the ball valve and see if this helps with the noise.

One of the gauges you can use is adjust the flow so that the water level in the aquarium is flowing back into the overflow boxes at a height of about 1/3 - 1/2 the way up on the over flow slots or vents without the water rising in the overflow box so high that it begins to flow into the vented hole in the top.

Try adjusting the Durso pipe so the vented hole on top is about 1" from the top of the aquarium or glass lid. Be sure the vent is open and clear of any obstructions.

You may find that using schedule 40 pvc piping is better than the flexible tubing to help eliminate water surges and noise.

There are different ways to drain the water into your sump that can eliminate noise, depending on the type of sump you are using.

Attached is my elbow inside the overflow. Inside Overflow Box is quiet. If i touch the airvent hole, water level inside overflow box drops. New Sucking noise will be made.

I gotta figure the pipes leading to sump

The drain goes into another 90 into plastic drawers for mechanical filtertation, wet dry. I have two drawers inside the 100g rubbermiad sump.

 

[4tanks]

Try sticking a small valve in the hole of your durso thus is the cap off the top of mine and can be adjusted for amount of air that gets in

 

[4tanks]

I also wonder if the spiral on that flexo is Creating a vortex and trying to suck more water than can fall

 

[4tanks]

Also the height is a big one of the durso they sometimes need playing with the u bend section IME needs to be about half in the water at the bend if that makes any sense it may need going up or down ever so slightly there maybe lots of air in the bend and may need going down a quarter inch so there is slightly more water going over hope this makes sense

 

[arowana718]

I also wonder if the spiral on that flexo is Creating a vortex and trying to suck more water than can fall

Inside the Spiral tubing smooth.

 

[arowana718]

Also the height is a big one of the durso they sometimes need playing with the u bend section IME needs to be about half in the water at the bend if that makes any sense it may need going up or down ever so slightly there maybe lots of air in the bend and may need going down a quarter inch so there is slightly more water going over hope this makes sense

The air vent hole is about 1/4 level to the teeth of the overflow

 

[4tanks]

Can it be moved up and down mine is in a rubber bh fitting and I can slide it up and down it’s worth a little playing with if it’s not bonded in place

 

[4tanks]

Can it be moved up and down mine is in a rubber bh fitting and I can slide it up and down it’s worth a little playing with if it’s not bonded in place

And try covering the hole you made in top slightly with finger too sometimes these Durso need a bit fine tuning

 

[Brad Drollinger]

Looks like the Durso pipe is fine, and if the overflow box is quiet, than I would narrow it down to two possibilities.

Adjusting the flow or the gallons per hour: usually if the flow is too strong and the drains on the overflow boxes are not able to handle the flow the water level will rise in the overflow box, and can flood over the vent hole and then you will get sucking noise, but it would be obvious that the water level is too high. Looks like it is a new set up, so the drain pipes and overflow boxes should be fine.

Drain Hose: I had a customer that had flexible drain lines and they made a lot sloshing noises and sounded like the water was surging inside the hose. It might just be the flexible nature of the hose.
When I changed the flexible hose to rigid schedule 40 PVC the noise was gone.

Let us know how it goes, hope you find a solution. I will check back later today.

 

[4tanks]

Looks like the Durso pipe is fine, and if the overflow box is quiet, than I would narrow it down to two possibilities.

Adjusting the flow or the gallons per hour: usually if the flow is too strong and the drains on the overflow boxes are not able to handle the flow the water level will rise in the overflow box, and can flood over the vent hole and then you will get sucking noise, but it would be obvious that the water level is too high. Looks like it is a new set up, so the drain pipes and overflow boxes should be fine.

Drain Hose: I had a customer that had flexible drain lines and they made a lot sloshing noises and sounded like the water was surging inside the hose. It might just be the flexible nature of the hose.
When I changed the flexible hose to rigid schedule 40 PVC the noise was gone.

Let us know how it goes, hope you find a solution. I will check back later today.

Good point I also had to add a couple of bends at the end of my return to slow it down

 

[arowana718]

See attached video

 

[arowana718]

Try sticking a small valve in the hole of your durso thus is the cap off the top of mine and can be adjusted for amount of air that gets in

Tried