From Replacing Smoke Candles to the Smartest Bait Stations: Modernizing Sewer-Based Pest Control With the Sewer Assassin™ System
Beneath every structure lies an overlooked battleground: the sewer and plumbing network. It’s here that rats, American cockroaches, and drain flies thrive—often completely undetected by surface-level pest control programs.
While many PMPs focus their efforts around the building exterior or interior treatment zones, the real source of recurring infestations is frequently underground.
Traditional methods weren’t designed to address this hidden world. That’s why the industry is shifting toward smarter, source-level solutions like the Sewer Assassin™—a modern system built to detect, monitor, and control sewer-breeding pests directly inside the plumbing.
The Old Way – Traditional Sewer-based Pest Control Methods
Trapping, Baiting, & Standard Treatments
Traps, glue boards, gels, and exterior rodent bait stations have long been used as frontline tools.
But when the infestation originates from the plumbing system, these methods provide only surface-level coverage. They are reactive—not proactive—and fail to stop pests traveling through pipes and entering structures from below.
Chemical foggers, sprays, dusts, and baits are effective—but only on the surface. When pests originate from sewer lines or deteriorating plumbing, these treatments are unable to prevent reinfestation.
Without addressing the plumbing system, the cycle continues.
For decades, PMPs have run into recurring infestations—rodents showing up in kitchens, American roaches appearing in basements, drain flies reemerging after cleaning. Instinctively, many technicians suspected the problem was coming from the plumbing system.
But suspicion wasn’t enough.
Without proper plumbing diagnostic tools, PMPs were limited in what they could confirm. Most would tell the customer:
“We think this may be coming from the sewer. You need to call a plumber.”
This approach created several challenges:
- PMPs had no way to prove the issue originated from sewer lines
- Customers often thought the PMP’s treatment failed
- Plumbers rarely performed pest-focused inspections
- The real source went untreated, leading to callbacks and account loss
Plumbing smoke testing by plumbers.
Smoke candles were used in old smoke test machines that were costly, messy, foul smelling, and could set off fire alarms.
As the industry evolved, it became clear that PMPs needed their own tools to diagnose and verify plumbing-based infestations without relying on outside trade.
Understanding Sewer-Based Infestations
Why Rats Love the Sewer
Sewers provide everything a rat needs:
- Entry points into buildings through vents, cracks, or improperly installed pipes
- Warth
- Moisture
- Protected travel routes
- A constant source of food
Rats can quietly move through plumbing and appear inside kitchens, storage rooms, or mechanical spaces without a single exterior sign. Once they invade, they have access to the entire structure.
Cockroaches & Drain Flies
American cockroaches and drain flies flourish in organic-rich, stagnant plumbing conditions.
Even after thorough interior cleaning or treatments, these pests often return within days because the hidden breeding sites and entry points—inside the plumbing—was never addressed.
The Transition to Modern Sewer-Based Pest Control
Identifying Entry Points With Precision
Today’s PMPs have smarter tools. Advanced plumbing inspection systems like FogTrace™ use scentless non-toxic fog to reveal:
- Cracked or broken pipes
- Improper plumbing installations
- Dry traps
- Illegal connections
- Hidden plumbing openings behind walls, floors, or ceilings
FogTrace dramatically increases accuracy and reduces guesswork.
The Need for In-Plumbing Control
Even the best surface program will fail long term if the pests originate from sewer lines.
Modern IPM strategies must include in-plumbing solutions—tools that work directly where rodents, roaches, and drain flies are breeding and traveling.
The Sewer Assassin™ System – A Modern Game Changer
What It Is & How It Works
The Sewer Assassin™ is the first patented in-line plumbing bait station for PMPs.
It replaces a cleanout cap and turns that location into a treatment point inside the plumbing system itself.
It installs in minutes and allows PMPs to utilize:
- Bait blocks
- Nuvan ProStrips
- Dusts
- Gels
…to intercept pests before they ever reach the interior of the property.
You must always use products labeled for sewer use-Label is law!
Benefits for Pest Control Pros
- Tamper-resistant & discreet — perfect for commercial and residential accounts
- New recurring revenue stream through monthly monitoring & servicing
- Improves customer trust by resolving long-standing issues other companies couldn’t
- Helps retain accounts by closing the last major gap in pest control programs
- Pairs with FogTrace™ to prove where the problem is—not due to a failed treatment plan
This system gives PMPs the ability to solve complex infestations previously pushed off to plumbers.
Real Results From the Field
Pest control companies across Chicago, San Diego, Raleigh, Phoenix, and other major cities report:
- Fewer callbacks
- Faster resolution of sewer-related infestations
- Stronger long-term control
- Increased customer satisfaction
- A more professional, advanced IPM program
- Increased revenue
Add-On Tools Enhancing Modern Sewer Control
- FogTrace™ Plumbing Smoke Detection – Locate plumbing breaches, defects, and pest entry routes with precision.
- Pest Strip Holder – Provides continuous control for sewer roaches and drain flies directly inside the plumbing lines.
The Next Evolution in Rodent Management: Invest in Sewer Assassin for Real Source Control
Treating surfaces alone is no longer enough.
Although our tried-and-true methods are still an absolute necessity, today’s pest control demands accuracy, efficiency, and a true understanding of where infestations start—not just where they appear.
The Sewer Assassin™ System isn’t just another tool.
It’s a complete modernization of sewer-based pest management, closing the final gap, empowering PMPs to solve infestations that were once considered untreatable.
Ready to upgrade your service plans for you pest control business?
Shop Now for the Sewer Assassin™ or Book a Demo to see how this system works in action.
How the Sewer Assassin™ System Transforms Modern Sewer Pest Control
1. Why are traditional sewer pest control methods no longer effective?
Traditional approaches like exterior bait stations, traps, smoke candles, and tracking powders only treat surface-level activity. When rats, roaches, or drain flies are breeding inside plumbing lines, these methods miss the root cause—allowing pests to continually reappear.
2. What makes sewer-based infestations so difficult to eliminate?
Sewers provide perfect breeding conditions: warmth, moisture, food runoff, and hidden travel pathways. Because infestations originate underground, pests enter properties through drains and plumbing, bypassing traditional treatments completely.
3. How does the Sewer Assassin™ modernize sewer pest control?
The Sewer Assassin™ is a patented in-plumbing bait station that replaces a standard cleanout cap. It allows PMPs to detect, monitor, and control pests directly inside the plumbing system, stopping infestations at the source before they enter the building.
4. What tools help identify where pests are entering the plumbing system?
FogTrace™ uses a controlled, non-toxic smoke system to reveal cracks, leaks, gaps, open lines, dry traps, or illegal connections. This gives PMPs exact visual proof of how pests are migrating through plumbing systems.
5. How does the Sewer Assassin™ benefit pest control companies?
It reduces callbacks, strengthens IPM programs, builds customer trust, and creates new recurring revenue opportunities. PMPs nationwide rely on it to solve persistent sewer-based infestations that traditional methods can’t control.