Overflow Box Problem

[JayceeGFX]

I need help with this noise the overflow box is making.
http://youtu.be/FyY7lP8CSQs

 

[noelskii]

Wow! Sounds like my toilet!

 

[JayceeGFX]

Anyone??????

 

[Clink51]

it seems like its draining to quick. have u tried putting a gate valve on the drain and throttling it?

 

[Mark2480]

That up and down motion of water is usually caused by there not being enough air getting into the drain tube.

 

[mrdobie]

I had a similar problem I put in a valve and turned up my return pump. faster flow and a little restriction on the pipe to my sump.

 

[viplok]

best way to solve this problem is a gate valve, dont get those home depot ball valve you cant really fine tune with those. OR reduce the flow on return if possible.

 

[albano]

Unless you have multiple drain pipes, restricting drain flow is a terrible idea... 'Slowing' the return pump is much safer

 

[ming]

The problem is caused because your drain can't drain fast enough until it creates a siphon. Once all air is out of the pipe, its siphoning the water down faster until it reaches below the pipe and sucks in air which breaks the siphon. Then the process repeats.

Have you tried removing that tubing on the top?
The second option would be to restrict the return pump so its pumping water up more slow. Like albano said, never restrict the drain unless you have more then 1 drain (second drain unrestricted) otherwise if some small debris falls to clog it a little more, then you will come home to an empty sump and wet floor

 

[cmantis]

You can either progressively drill out bigger holes until it equalizes or you can try moving the air tubing up and down until you find the sweet spot.

 

[Adamc1303]

The airline tubing is acting as a siphon break by letting air into the pipe. It also keeps it quieter. However the pipe isn't getting enough air for the amount of water it's draining so it keeps siphoning even though it has a siphon break. You can either slow down the return pump to slow down the amount of water through the overflow box and then drain pipe or you can increase the size of the airline tubing. You can increase it to 3/8" or 1/2" RO or airline tubing and put a valve on it. Although you aren't running a full siphon system at all like a Bean Animal or Herbie so I am not even sure a valve on the airline will be needed. Bottom line is that if you want it to stop siphoning you need to get more air in the system by increasing the size of the tubing.

 

[ming]

The airline tubing is acting as a siphon break by letting air into the pipe. It also keeps it quieter. However the pipe isn't getting enough air for the amount of water it's draining so it keeps siphoning even though it has a siphon break. You can either slow down the return pump to slow down the amount of water through the overflow box and then drain pipe or you can increase the size of the airline tubing. You can increase it to 3/8" or 1/2" RO or airline tubing and put a valve on it. Although you aren't running a full siphon system at all like a Bean Animal or Herbie so I am not even sure a valve on the airline will be needed. Bottom line is that if you want it to stop siphoning you need to get more air in the system by increasing the size of the tubing.

Its possible that tubing is clogged, that's why I suggested to remove that tubing first. But no response on this thread yet...

 

[Adamc1303]

Its possible that tubing is clogged, that's why I suggested to remove that tubing first. But no response on this thread yet...

Yeah but if it's clogged why would it work for a few seconds and then build up and flush out? Wouldn't it just build up??? Whatever if the guy checks his thread he has what to start with to figure out the issue...

 

[Juggernot55]

I went over and fixed it. Replaced the top 90 with a T and made a larger hole for the air installed a valve on top so he can adjust the airflow. Works great now. Jay if you want post a pic.