We have workers in the house right now installing a shower to replace the tub. The plumber had to change out the drain to meet the 2" code requirement. The pan has been set and they’re prepping for the shower walls.
Here’s the problem: when the toilet is flushed now, the sound of the water going down the drain pipes is very loud at the new shower drain, possibly because they shortened the pipe run. Is there any way for the plumber to mitigate this issue?