Water backing up through a drain is a sign that wastewater is not moving through the drainage system normally.
Sometimes the problem affects one fixture. Other times, water appears in a bathtub, shower, floor drain or toilet when another fixture is being used. That can point to a blockage farther down the drainage system.
Where the backup appears and which fixtures are affected provide useful clues.
One Drain or Several?
Start by determining how widespread the problem is.
If a single sink drains slowly while everything else works normally, the restriction may be close to that fixture.
If several fixtures are slow, gurgling or backing up at the same time, the problem may be farther along a shared drain or sewer line.
Why Does Water Come Up Through a Floor Drain?
Floor drains are often among the lowest drainage openings in a building.
When wastewater cannot continue moving through a restricted drainage line, it may appear at a lower fixture or drain.
The water coming from the floor drain is therefore not necessarily caused by a problem with the floor drain itself.
Why Does Water Back Up Into a Bathtub or Shower?
A similar principle applies to tubs and showers.
Because their drains are relatively low, they can become a place where wastewater appears when a downstream drain is restricted.
For example, flushing a toilet may cause water to appear in a nearby bathtub if the shared drainage path is blocked.
What Causes Drain or Sewer Backups?
Potential causes include accumulated debris, material lodged in a drain, root intrusion, damaged piping or other restrictions within the drainage system.
The location and nature of the blockage need to be identified before deciding on the appropriate repair.
Repeated backups are particularly important to investigate because they may indicate that simply clearing the immediate symptom has not addressed the underlying problem.
Stop Adding Water to the Drainage System
If wastewater is actively backing up into the home, avoid unnecessary use of toilets, sinks, showers, dishwashers and washing machines.
Water entering the drainage system has to go somewhere.
If the downstream path is blocked, continuing to use fixtures can make the backup worse.
Be Careful Around Wastewater
Water from a sewer or drain backup may contain contaminants.
Avoid unnecessary contact with backed-up wastewater and keep children and pets away from the affected area.
Depending on the extent of the backup, professional cleaning or restoration may be appropriate after the plumbing problem has been corrected.
How Is the Cause Identified?
The appropriate diagnostic approach depends on the symptoms and plumbing system.
A plumber will consider which fixtures are affected, where the backup appears and whether the problem is isolated or occurring throughout the building.
Further inspection may be needed to determine the location and cause of the restriction.
Is a Sewer Backup a Plumbing Emergency?
Wastewater actively entering a home should be taken seriously.
If you cannot use your plumbing without causing additional backup, the problem should generally be addressed promptly.
Help With Urgent Plumbing Problems in Kamloops
Stillwater Plumbing & Heating can investigate urgent drainage and plumbing problems and determine the appropriate next step.
For emergency plumbing service in Kamloops, call (250) 819-8247.
FAQs
It can indicate a restriction in a drainage line shared by the fixtures. The bathtub may be one of the lower places where backed-up water becomes visible.
Multiple affected fixtures can indicate a restriction farther down the drainage system rather than separate clogs at each fixture.
It is generally best to limit water entering the drainage system until the cause of an active backup is identified.
Wastewater can contain contaminants. The appropriate clean-up depends on the source and extent of the backup.
No. A blockage can have several possible causes. Inspection is needed to determine whether the pipe itself is damaged.
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