A bathroom sink that fills while you brush your teeth or drains slowly after shaving is one of the most common calls we get. Hair, toothpaste, soap and grooming products build up in the pop-up drain and P-trap. In homes with hard water, mineral deposits make the problem worse by narrowing the pipe.
We clear bathroom sink backups and fix the pop-up and trap so your sink drains freely again.
Bathroom Sink Backing Up Around Markham
In busy Markham households, bathroom sinks see a lot of use: shaving, brushing teeth, washing faces and styling hair. All of that sends hair, toothpaste, soap and product residue down the drain, and it builds up in the pop-up stopper and trap.
Hard water adds mineral deposits to the mix, which can make buildup stick to pipe walls. In older homes, galvanized drain pipes under bathroom sinks can narrow with corrosion, making clogs more frequent.
Double-sink vanities in ensuites share a drain, so a clog in one can affect both. We check the whole setup when we clear the line.
If your sink is backing up and the tub or toilet in the same bathroom is also slow, the branch line serving that bathroom may be blocked. Clearing the branch fixes all of them.
Basement bathroom sinks in finished lower levels are sometimes connected to pump systems. If yours is, let us know when you call so we come prepared.
We'll also check the overflow opening, which can collect buildup and cause odours even when the sink drains properly.
Once the sink is clear, we'll share a few simple habits that help keep it that way, like cleaning the stopper regularly and using a drain screen.
If you rent out a basement suite, clogged bathroom sinks are one of the most frequent tenant calls. Adding inexpensive drain screens to every sink in the unit and giving tenants a short list of what not to rinse down the drain can cut those calls noticeably, and we're happy to leave screens behind when we visit.
Signs You Need Bathroom Sink Backing Up
Call if your bathroom sink shows these signs:
- Water drains slowly. Hair and soap are building up in the stopper or trap.
- Water backs up into the basin. The trap or branch line is blocked.
- Gurgling sounds. Air is being pulled through a restricted drain or venting issue.
- Bad smells. Buildup in the trap produces odours.
- Other bathroom fixtures draining slowly. A shared branch line may be blocked.
How We Do It
- 1
Remove the stopper
We pull the pop-up and clean buildup from the stopper and drain body.
- 2
Clean the trap
The P-trap is removed and cleaned, or the line is cleared with a small auger.
- 3
Clear the branch line
If needed, we snake the line beyond the trap to the stack.
- 4
Reassemble and seal
We reinstall the trap and pop-up with fresh seals.
- 5
Test
We fill and drain the basin to confirm free flow and no leaks.
Why Choose Markham Plumbing
Chemical drain cleaners often don't reach the real blockage and can damage pipes. We clear the drain mechanically and fix the pop-up so the sink works properly.
- Mechanical cleaning
- Fresh seals
- Branch line checks
- Tidy work
Bathroom Sink Backing Up FAQs
How can I prevent my bathroom sink from clogging?
Clean the stopper regularly and use a drain screen if possible. Avoid rinsing large amounts of hair down the sink.
Are chemical drain cleaners safe?
We recommend avoiding them. They can damage pipes and seals and may not fully clear the clog.
Why does my sink smell even when it drains?
Buildup in the overflow or trap can smell. Cleaning both usually helps.
Could a slow sink mean a bigger drain problem?
If several fixtures are slow, the branch line or main may be partly blocked.