Sewage or dirty water rising from a floor drain
Often: Blocked main line; city sewer full in heavy rain
Find what you're seeing, how urgent it is and what usually fixes it. When it can't wait, call.
Takes about a minute. Tell us what's happening, what kind of building it is, and the town or neighborhood.
Water flowing? Close the fixture valve or the main shutoff. Sewage? Stop using water and stay out of it. Water near electrical? Keep away. Smell gas? Leave and call 911 or the gas utility from outside.
Filter by where the problem is.
18 symptoms
Often: Blocked main line; city sewer full in heavy rain
Often: Bathroom or appliance above; riser leak
Often: Frozen pipe, failed fitting, corroded pipe
Often: Clog in the toilet or line below; stuck fill valve
Often: Corroded tank
Often: Main line clog, roots, blocked house trap
Often: Grease in a shared kitchen stack
Often: Water heater, pilot or element; central system in apartments
Often: Groundwater, sump pump, or sewer backup
Often: Dry floor drain trap, vent or cracked pipe
Often: Hidden leak in pipes or a running toilet
Often: Partial main line clog or vent problem
Often: Old galvanized pipe, valves, roof tank or pump
Often: Old shower valve without pressure balancing
Often: Worn flapper or fill valve
Often: Worn cartridge or washer
Often: Corroding galvanized pipe or water heater
Often: Freeze damage; no winter shutoff
If water is actively flowing where it shouldn't, sewage is coming into the building, water is near electrical equipment, or you have no water at all in freezing weather, treat it as urgent. Shut off the water if you can and call.
Simple checks are fine: closing a valve, plunging a toilet, checking whether neighbors have the same problem. Leave gas, electrical, pressurized systems and sewage clean-up to professionals. In NYC, plumbing repairs must be done by or under a licensed plumber.
In most rentals, the landlord or building. Tell the super or management first. See apartment plumbing.