Introduction
The Thetford RV Level Gauge Cleaner is an enzyme and surfactant-based solution designed to restore the functionality of holding tank level sensors in RVs and boats. Over time, tissue, waste, and soap scum can accumulate on these sensors, leading to inaccurate readings. This cleaner works to digest and dissolve these buildups, ensuring your level gauges provide correct information.

Image: Thetford RV Level Gauge Cleaner 19 oz bottle.
Key Features
- Versatility: Designed for use with RVs and boats.
- Functionality: Dissolves tissue sludge and soap scum build-ups, restoring level sensor operation.
- Utility: Prevents future buildups on probes and tanks when used regularly.
- Convenience: Formulated to work effectively in both grey and black water tanks.
- Safety: 100% biodegradable formula.
Setup and Operating Instructions
Follow these steps to clean your holding tank level sensors and restore accurate readings:
- Empty Tank: Ensure your holding tank (black or grey) is as empty as possible before starting the cleaning process.
- Fill with Fresh Water: Fill the tank with fresh water. For best results, perform this on a warm day.
- Add Cleaner: Pour approximately half a bottle (or the entire bottle for heavily soiled tanks) of Thetford RV Level Gauge Cleaner directly into the toilet for black tanks, or down a sink/shower drain for grey tanks.
- Mix by Driving: Drive your RV or boat for a period to allow the movement to thoroughly mix the cleaner with the water and dislodge deposits from the tank walls and sensors.
- Soak Time: Let the solution sit in the tank for at least 24 hours. For stubborn buildups, allowing it to sit for 48 hours or longer may yield better results.
- Drive Again (Optional): If possible, drive the vehicle again after the soak period to further loosen any remaining deposits.
- Empty and Rinse: Empty the tank completely at an approved dump station. Rinse the tank thoroughly with fresh water until the discharge runs clear.
For a visual guide on how the cleaner works and application, please refer to the videos below.
Maintenance
To prevent future sensor issues and maintain optimal tank performance, regular use of Thetford RV Level Gauge Cleaner is recommended. Incorporate this cleaning process into your routine every 4-6 months, or as needed depending on your usage and the type of waste.
Troubleshooting
If your level sensors are still not reading correctly after following the initial cleaning steps:
- Repeat the Process: For very heavy or long-standing buildups, a second application and soak cycle may be necessary.
- Increase Soak Time: Extend the soak time to 48-72 hours if possible.
- Consider Tank Flusher: For persistent issues, consider using a tank flusher tool to physically dislodge stubborn debris from the tank walls and sensors.
- Professional Inspection: If problems persist, consult an RV service professional to inspect the sensors for potential electrical or mechanical failures.
Specifications
| Attribute | Value |
|---|---|
| Brand | Thetford |
| Model Number | 24545 |
| Item Weight | 1.16 pounds (0.526 kg) |
| Product Dimensions | 2.75 x 3.75 x 8.25 inches (7 x 9.5 x 21 cm) |
| Item Form | Liquid |
| Scent | Unscented |
| Special Features | Residue Free |
| Material Feature | Biodegradable |
Safety Information
CAUTION: Eye and skin irritant. See cautions on back of product label for full details.
Always handle chemical products with care. Wear appropriate personal protective equipment, such as gloves and eye protection, when handling. Keep out of reach of children and pets. In case of contact, rinse thoroughly with water. If irritation persists, seek medical attention.
Product Videos
Thetford RV Level Gauge Cleaner - How it Works
Video: This video from 'Your RV Specialists' explains the function of the Thetford Level Gauge Cleaner, demonstrating how it cleans sensors by dissolving sludge and toilet paper buildup inside holding tanks. It also shows a model of how RV tank sensors work.
Thetford RV Level Gauge Cleaner - Application Guide
Video: This video from 'Merchant Video' highlights common RV sensor issues and provides a step-by-step guide on how to use Thetford Level Gauge Cleaner to dissolve tissue, waste, and soap scum, restoring sensor accuracy.
Warranty and Support
Warranty information for Thetford products is typically provided with the product packaging or available on the official Thetford website. For specific warranty details or technical support, please refer to the contact information provided by Thetford or visit their official website.