Camco TST Orange Waste Holding Tank Treatment 32 oz -- Part CMC41190 / 41190

Serious Odor Control Without the Chemical Smell

Most RV tank treatments trade one bad smell for another. Camco TST Orange breaks that pattern with a concentrated citrus formula that actually neutralizes odors at the source rather than masking them with perfume or formaldehyde. The result is a fresh-smelling rig and a cleaner tank -- without the hazardous chemical warnings that come with older formaldehyde-based products.

Beyond odor control, TST Orange actively breaks down solid waste and toilet tissue to reduce the buildup and clogging that leads to sensor fouling and sluggish dumps. The formula also coats and lubricates tank level sensors, which helps restore accuracy to those notoriously unreliable black-tank readings.

Dosing by Application

TST Orange is flexible enough to handle several waste management scenarios in one jug. Use the correct dosage for each application:

• Standard RV black tank (up to 40 gallons): Add 2 oz to the tank before use, followed by enough water to distribute the formula. Repeat every 7 days or at each dump.
• Large tanks, extended trips, or temps above 85 deg F: Increase dose to 4-6 oz per 40 gallons. Heat accelerates bacterial activity and odor production, so extra treatment compensates.
• Portable toilets: Add 1 oz to the holding tank, then add enough water to cover the bottom of the tank.
• Gray tank or water tank deodorizing: Add 2 oz through a sink drain and flush with water for 30 seconds to treat gray-side odors and buildup.

Why Formaldehyde-Free Matters

Older RV tank chemicals relied on formaldehyde as the active biocide. Formaldehyde-based treatments are now banned or restricted at many dump stations and RV parks, particularly in California and other western states. They also kill the beneficial bacteria in septic systems downstream. TST Orange uses a biodegradable citrus-based formula that is fully compliant and safe wherever you dump.

Tips for Best Results

• Always add at least 2 cups of water to the bowl after each toilet use to help distribute the treatment and prevent waste from drying on tank walls.
• Empty and flush waste tanks weekly regardless of fill level -- even if the tank is not full, stagnant waste builds up odor and sensor fouling faster than many owners expect.
• Use only RV-safe single-ply or rapidly dissolving toilet paper to reduce solid buildup that treatment alone cannot fully eliminate.
• For a fresh-start treatment after a season layup, add a double dose and let it sit for 12-24 hours before dumping.

Product Specifications

Formula Specifications

Dosing Reference

Temperature and Storage

Compatible Applications