Noisy return pipes (bubbling) -- overflow is quiet

[MitchM]

Originally Posted by SteveW

....The problem is in the sump. As a result of air mixing with the drain water, the drain hoses make a ton of bubbling noise: large bubbles come out at the ends. I can see the hoses themselves are not "full" of water - I can see the water level coursing within them as it rushes back to the sump. It sounds like large pot of boiling water. ...

Thanks...
- Steve

I had the same problem. I took a couple of plastic bags, cut the ends off and used a nylon tie to secure them to the ends of the hose.
It's a simple baffle system that works great.
Lets water through itself kinda like a windsock at the airport.

Mitch