Pipe draining into crawl space
I just bought a house (older) and I've been noticing a funny smell -- like raw sewage. So, I went down to my crawl space today to investigate. I noticed that there is a pipe that dumps water into the crawl space every time a toilet is flushed or a sink is turned on in the house. The pipe is a vertical piece connected to a horizontal one. So, when a toilet is flushed, water pushes up through it and onto the ground of my crawl space. Is that normal? I've never owned a house before but I know that moisture in a crawl space can be a serious issue. It looks like it was designed to do this though. The pipe isn't broken or anything. I'm a bit baffled. Should I call a plumber?