Noisy Drain Line

[monocus]

use a stockman standpipe with a breather valve

[iamfrontosa]

Instead of using the 90deg elbow, maybe the 45deg one might make things quieter.

[Ron99]

Originally Posted by iamfrontosa

Instead of using the 90deg elbow, maybe the 45deg one might make things quieter.

i suspect the noise is more form air being sucked down the one drain line along with the water. not sure changing the elbow would help much. you need a way to balance the flow in the drain.

[darb]

It seems to be from the air that gets drawn into the line at the bottom of the standpipe.

The 90 is glued in; going to try pipe insulation.