How do I clear a clogged black tank sensor?
To clear a clogged black tank sensor in your Tiffin motorhome (so it stops reading "full" when it’s not), here’s a proven process that balances DIY and effectiveness:
🧼 Step-by-Step: How to Clear a Clogged Black Tank Sensor
1. Drain the Black Tank Completely
- Hook up to a dump station and fully empty the tank.
- Flush the tank if your rig has a built-in black tank flush system.
2. Add Cleaning Solution
- Choose one of these options:
- DIY method: Mix 1 cup of Calgon water softener + 1 cup of dish soap (like Dawn) with several gallons of warm water.
- Commercial product: Use Happy Campers, TankTechsRx, or Camco TST Sensor Cleaner.
- Pour into toilet and flush. Add ~5–10 gallons of water to the black tank afterward.
3. Drive Around
- The motion of driving will slosh the solution around and break up stuck waste and debris on the sensors.
- Aim for at least 30–60 minutes of driving.
4. Let it Sit (if needed)
- Park the RV with the solution in the tank and let it soak overnight or up to 24 hours.
5. Dump and Flush Again
- Empty the tank and flush thoroughly using your black tank flush system.
- Check the sensor readings—repeat if they’re still inaccurate.
🔁 Preventative Tips Going Forward
- Always start with at least 3–5 gallons of water in the black tank after dumping.
- Use tank treatment regularly (enzyme or bio-based).
- Never leave the black tank valve open at a campground (solid waste piles up and causes clogs/sensor problems).