Backed-Up Basement? Here’s What to Do (Before It Gets Worse)

You head downstairs and see water pooling around the drain. It smells… off. Your toilet’s gurgling. And the floor drain is bubbling.

If you’re reading this with your shoes already wet — we’ve got your back.

A basement backup is stressful, messy, and potentially dangerous. But acting quickly and knowing what steps to take can make all the difference between a clean-up job and a full-blown disaster.

Here’s what causes backups, what to do right now, and how to stop it from ever happening again.

 Why Your Basement Might Be Backing Up

Basement backups usually happen when something blocks wastewater from flowing out through your main drain line. That waste — with nowhere to go — comes back up through the lowest point: your basement.

Common causes in Toronto & the GTA:

• Tree roots invading old clay pipes

• Collapsed or cracked sewer lines

• Grease, wipes, or debris buildup

• Overloaded city sewer systems during storms

• No backwater valve installed

• Drain slope problems or “bellies” in the line

 What to Do Immediately

If you’re dealing with an active backup:

1. Stop using all water in the home — no flushing, no washing, no draining

2. Turn off the water main if needed

3. Avoid walking through sewage — it’s a health hazard

4. Call a licensed plumber ASAP (yes, we’re here: 647-833-6743)

5. Document the damage for insurance (photos/videos)

Don’t try to snake or fix a serious backup yourself — the blockage is usually far deeper than a plunger can reach.

 How We Fix It at UPR

Every backup starts with a camera inspection to locate the issue:

• If it’s a soft blockage (grease, debris), we’ll snake or jet the line

• If it’s roots or pipe damage, we’ll recommend trenchless repair or replacement

• If it’s city sewer overload, we’ll check for a backwater valve and sump system

We handle the repair, cleanup referral, and help you document for insurance or city rebate programs.

 How to Prevent It from Happening Again

• ✅ Install a backwater valve (up to $1,250 rebate in Toronto)

• ✅ Replace deteriorated clay or cast iron pipes

• ✅ Avoid flushing wipes, paper towels, or grease

• ✅ Get a drain camera inspection every few years

• ✅ Upgrade your main drain to modern plastic with proper slope

Call UPR 647-833-6743
Book Emergency Backup Service
Serving Toronto, Mississauga, Scarborough, Etobicoke, and nearby cities