Inaccurate tank level readings are one of the most common frustrations for RV owners, and the fix is usually not a new sensor -- it is a good cleaning. Camco TST Probe Cleaner is a super-concentrated liquid formula designed to dissolve the sludge, tissue, and waste residue that coats holding tank probes and causes them to read "full" even when the tank is not. One 32 oz jug delivers multiple treatments, and the biodegradable formula is safe to dump at any approved septic station.
Black and grey water tank probes are mounted inside the tank walls. Over time, toilet paper residue, grease, and waste solids coat the probe tips and create a conductive bridge that fools the monitor panel into showing a partial or full reading -- even after you have dumped and flushed. Camco TST Probe Cleaner attacks that residue directly, restoring the electrical isolation the probes need to read correctly.
The formula is safe to pour through the toilet, sink drain, or shower drain. It works through your existing plumbing lines and does not require disassembly or special tools. Use it at the start of a season, after a long storage period, or any time your monitor panel readings seem off.
Just 4 oz of formula treats a 40-gallon holding tank, so one 32 oz jug delivers up to 8 full treatments.
Effective in both black water and grey water tanks. Addresses the unique residue profiles in each.
Pour directly through the toilet, sink, or shower. No special tools, no tank removal, no fittings.
Safe for use in RVs and boats. Biodegradable and approved for discharge at standard RV dump stations and septic systems.
Application is straightforward and requires no special equipment:
Most RV holding tanks use resistance-based probes -- electrical contacts mounted at 1/3, 2/3, and full levels on the tank wall. When waste or grease bridges two probes, it creates a continuous circuit that the monitor panel reads as "full." Standard tank treatments and regular dumping often do not remove this coating because it is baked on by repeated use and temperature cycles.
TST Probe Cleaner is formulated specifically to penetrate and dissolve this type of residue, not just mask odors or break down solid waste like a standard treatment. It is a corrective cleaner, not a deodorizer.
Camco TST Probe Cleaner is suitable for:
This product cannot be shipped by air due to its chemical classification. Ground shipping only. Keep out of reach of children. Store in a cool, dry location away from direct sunlight. This item is non-returnable once purchased.