Sump pit odor and low volume constant running water
Hello,
I am a relatively new home owner and things have been great up until now. Recently down by the laundry I noticed a sewer-like odor and also noticed the sound of lightly running water. I moved over the metal lid and looked down into the sump pit and noticed a larger pipe, maybe 4-5" in diameter, that is draining water into the pit from the side (looking directly down the sump pit, the pipe is perpendicular to it). This is where the constant running water sound is coming from, and I assume the smell as well, as neither were there before about a week ago. We have not had any particularly large amount of rain lately, and none in the past 3 or 4 days, but the sound has been there consistently for about a week now. I was wondering what this pipe even is, and if it is something I need to be concerned about, especially because of the sewer smell. Any and all help is much appreciated.