A backed-up toilet is one of the most frustrating plumbing issues for any homeowner — especially when it happens unexpectedly. If you live in Arvada, CO, and your toilet is overflowing, slow to flush, or gurgling, you’re not alone. Our local plumbers explain the most common reasons behind toilet backups in Arvada and how to fix or prevent them.
Common Reasons Your Toilet Keeps Backing Up
1. Clogged Drain Line
This is the most common culprit. Toilet paper, wipes, and hygiene products can build up over time and block the drain. Even so-called "flushable" wipes can cause clogs, especially in older plumbing systems common in Arvada neighborhoods like Olde Town or Scenic Heights.
Fix: A plunger or toilet auger may clear minor clogs. For deeper issues, a plumber may need to use a drain snake or hydro-jetting.
2. Tree Roots in Sewer Line
Many older homes in Arvada have clay or cast iron sewer lines that are vulnerable to tree root intrusion. Roots can grow into small cracks and completely block the flow over time.
Signs: Multiple backed-up fixtures (toilets, tubs, sinks), slow draining, or gurgling noises from pipes.
Fix: A sewer camera inspection followed by root removal and possibly trenchless pipe repair or replacement.
3. Blocked Vent Stack
Your home’s plumbing needs air to function properly. A blocked vent stack (usually on your roof) can prevent your toilet from flushing efficiently, leading to backups.
Fix: A professional plumber can safely inspect and clear your vent pipe, especially if debris, nests, or snow buildup is the cause.
4. Old or Damaged Pipes
Homes in areas like Lamar Heights or Alta Vista may still have aging plumbing materials prone to corrosion or collapse. Narrow or deteriorated pipes can slow flow and cause frequent backups.
Fix: Pipe replacement or relining may be necessary depending on the severity of the damage.
5. Sewer Line Backup
If the problem isn’t just your toilet — if your shower or sink also shows signs of slow drainage — the issue might be with the main sewer line. Arvada’s storm-heavy springs can also contribute to overloaded municipal lines.
Fix: Contact a licensed plumber to perform a sewer scope and determine if the issue lies on your property or with the city.
What You Can Do Right Now
Stop flushing! Don’t flush again until you know what’s causing the issue — more water will only worsen the backup.


Try a plunger. A basic flange plunger can sometimes clear minor blockages.


Check other drains. If multiple fixtures are slow or backing up, it’s likely a main line issue.


Call a local plumber. If DIY solutions don’t work or you suspect a deeper issue, it’s time to get expert help.
How Arvada Plumbers Can Help
At Cardom Plumbing & Heating, our licensed plumbers know Arvada’s plumbing infrastructure inside and out. We provide:
Same-day emergency service


Sewer camera inspections


Root removal and drain cleaning


Full toilet repair and replacement


Trenchless sewer line repair


Whether you’re in West Arvada or near Standley Lake, we’re just a call away.
Prevent Future Toilet Backups
Only flush toilet paper — nothing else.


Install a drain screen to catch hair and debris.


Schedule annual drain inspections, especially in older homes.


Don’t ignore small slow drains — they often signal a bigger issue.
Toilet Acting Up in Arvada? We’re Here to Help!
Don’t let a backed-up toilet ruin your day. If you’re dealing with slow flushes, strange noises, or overflows, trust your local Arvada plumbing experts. Call Cardom Plumbing & Heating today for fast, friendly service — we’ll get your bathroom back in working order in no time.