“Dear PoPville,
Over the weekend in my Columbia Heights rowhome, sewage-looking material came up in my basement drains unprovoked (2 outside/1 inside) as well as a little in basement toilet/tub.
Everything otherwise was draining properly and when it came up you could hear some kind of suction noise. After the rain yesterday, it receded (though have to clean up the sludge residue left over).
Has anyone else had this happen? Any reasonable plumbers you know and how much you paid?”