
Installation of the Sewer Assassin Rodent Bait Station
The worldâs first rodent bait station designed specifically for plumbing.
The Sewer Assassin was created to help Pest Management Professionals (PMPs) close a critical gap in structural rodent control. This isnât just another rat bait stationâitâs a game-changer. Designed to prove, monitor, and control rodent activity entering homes and businesses through deteriorating, faulty, or improperly installed plumbing, it offers a solution for PMPâs where none previously existed.
Ever heard of rats in the toilet? If you work in urban rodent control, chances are you have. Until now, the typical advice was, âYou might want to call a plumber.â Not anymore.
With the Sewer Assassin, we finally have a reliable solution to this persistent and growing problem.
Installation is quick and easy:
Simply locate any in-ground or in-wall 3â or 4â clean-out. Remove the existing cap and replace it with the Sewer Assassin. Just like that, you’ve turned a standard plumbing access point into a fully functional, legal rodent bait station.
Letâs go over how easy it really is to install.
Whatâs in the Box?
Every Sewer Assassin kit includes the parts you’ll need for either installation type:
- Â Cap
- Â Fixed post (inside the cap)
- Threaded rod
- Spacer
- Crimp collar (x3)
- Wing nut
- Steel braided wire with stopper
Suggested tools: Channel locks, wire cutters, screwdriver, flashlight, and latex gloves.

Option 1: In-Ground Clean-Out Installation
 Step-by-Step
- Measure your clean-out cap to ensure youâre using the correct size.
- Slide the crimp collar over the steel braided wire
- String the wire through a labeled rodenticide block or monitoring bait.
- Attach the baited cap to the clean-out.
- Lower the bait into the pipe until it touches the horizontal line.
- Pull the wire up 2â3 inches to lift the bait slightly off the pipe bottom. Pro Tip: Bend the wire at the right depth to mark your placement.
- Thread the wire through the hole on the fixed post inside the cap.
- Slide the crimp collar up and over the excess wire and tighten the screw to secure it.
Thatâs it. The bait is suspended in place, ready to monitor or control rodent activity in the sewer line.

Option 2: In-Wall Clean-Out Installation
Step-by-Step
- Remove the existing cap from the wall clean-out.
- Screw the threaded rod into the center of the new cap (A).
- Determine the depth of the pipe inside the wall cavity so the rod doesnât interfere with reinserting the cap.
- Slide the spacer onto the rod, followed by the rodenticide or monitor block.
- Adjust the rod length so the bait sits above any water or waste flow.
- Secure the bait using the wing nut to the threaded rod.
Screw the cap back into the clean-out and secure it tightly to make it tamper-resistant.

Monthly Servicing
Once installed, treat the Sewer Assassin like any other exterior bait station:
- Check monthly.
- Replace bait as needed.
- Monitor for signs of rodent activity.
Itâs a recurring revenue stream that pays for itselfâfast.
California compliance tags also available for the device sold separately.
Pro Tip for Pest Control Companies
Whether it’s an in-ground or in-wall clean-out, the Sewer Assassin gives you a fast, effective way to prove, monitor, and control rodent entry through plumbing.
Each install turns into a new monthly service.
Sewer Assassin is not only the best rodent bait station for plumbing, but also the only rodent bait station for plumbing.
The Sewer Assassin is more than just a catchy name; it’s an effective device that addresses a long-standing issue for pest control experts: rodents entering through sewer systems. More than just a bait station, this is a structural rodent control game-changer with easy installation, recurring revenue potential, and proof of entry capabilities.
With the Sewer Assassin, neglected plumbing access points may be transformed into proactive pest management solutions, whether you’re dealing with in-wall or in-ground clean-outs. Begin providing your customers with comfort and a more intelligent method of preventing rodents from ever getting to the toilet.