Top 10 RV Gray Water Tank Treatment – RV Sewer Chemicals & Cleaners

As an Amazon Associate I earn from qualifying purchases.

1. Camco


40256, Sink Traps and Waste Vents, Camco TST Lemon Scent RV Grey Water Odor Control, 40 Gallon Holding Tanks 64 Ounce Bottle, Stops Sink Trap Odors, For Use In Drains, Treats up to 16

Camco #ad - Fresh lemon scent. Remove grease buildup in your gray water system. 4 ounces treats 40 gallon gray water tank. Eliminates odors. 64 oz Bottle.
BrandCamco #ad
ManufacturerCamco #ad
Height3.5 Inches
Length9.4 Inches
Weight1 Pounds
Width4.55 Inches
Part Number40256

2. Thetford


RV Grey Water Tank Treatment, 24 oz, Thetford 15842, Grey Water Odor Control

Thetford #ad - Utility: prevents grease build-up in grey water holding tank, eliminating the source of offensive odors. Versatility: thetford's grey water odor control is designed to eliminate and prevent offensive odors in RV grey water holding tanks, drains, vents, showers, and traps of sinks.

Functionality: Dissolves cooking grease and cleaning residues. Prevents and removes grease build-up. Easy to manage 24 ounce bottle. Pleasant floral scent. Eliminates grey water odors in RV drains and vents; No chlorine or solvents to damage valve seals. Convenience: Formulated without chlorine or solvents to damage valve seals. Safety: grey water odor control is a 100% biodegradable liquid acting as a deodorant and detergent. Non-staining, 100 percent biodegradable formula.
BrandThetford #ad
ManufacturerThetford #ad
Height2.5 Inches
Length8.5 Inches
Weight1.69 Pounds
Width3.5 Inches
Part Number15842

3. Walex


Walex Bio-Pak ELEMBG-BIOPPBG Black Water / Elemonate Gray Water Holding Tank Toilet Treatment Deodorizer Drop Ins Combo Pack

Walex #ad - Slide zipper bag For Easy Storage and Freshness. No more stinky toilet - Unbeatable Odor Prevention. New advanced enzyme formula! Now Even Better for Breaking Down Waste and Order Control. 1 portion control product In The RV and Marine Industry. Cleans the sensors inside the Grey and Black Tanks to Assure Accurate Reading of Tank Levels.
BrandWalex #ad
ManufacturerWalex #ad
Height2.4 Inches
Length9 Inches
Width7 Inches

4. Walex


Walex Elemonate RV Grey Water Deodorizer & Freshener, Lemon Scent Pack of 5

Walex #ad - Dissolves grease and organic sludge from drain lines and grey tank. Deodorizes grey tank. Freshens sink and drain lines. Rapid dissolve tablet. Bio-degradable.
BrandWalex #ad
ManufacturerWalex Products Company, Inc #ad
Height9.25 Inches
Length2.01 Inches
Weight0.54 Pounds
Width7.99 Inches
Part NumberELEMBG
Warranty2 years



64 Treatments, HAPPY CAMPERS Organic RV Holding Tank Treatment

HAPPY CAMPERS #ad - Odor free: eliminates odors in the RV holding tank. Absolutely no chemical or sewer smell. Biodegradable, environmentally friendly, septic tank friendly. Extended dump interval: Keeps on working don't have to add more before dumping. Effective: in extreme hot & cold temperatures over 100°. Liquify: waste solids & most ordinary household tissue no expensive special tissue needed.
ManufacturerRV Concepts #ad
Part NumberHC-64-oz

6. Unique


Liquid Toilet Treatment 16 Treatments, 32 oz., 413-az, Unique RV Digest-It Holding Tank Treatment

Unique #ad - Breaks down solid waste inside tanks. Extra strength activated cleaners eliminate odors at their source without covering them with overpowering perfumes. Works in black and gray tanks. Liquifies human waste and all brands of toilet paper.

Digests residual sludge from years of build-up. Helps prevent sensor malfunction. Cleans and removes solid waste and paper before it can cling to sensor probes, preventing misreads. Proprietary formula contains billions of activated bio-enzymatic cleaners per treatment. The strongest, all-around treatment. No outdated chemicals.

Breaks down waste and eliminates odors in RV holding tanks. Trusted & effective. No overpowering fragrances. Proudly made in the USA. Trusted choice that you can feel confident using around your family and pets. Safe and beneficial for septic systems at home or at campgrounds. Complies with all state dumping laws. No worries! Eliminates toilet & tank odors without masking.
BrandUnique #ad
ManufacturerUnique Manufacturing & Marketing #ad
Height9 Inches
Length3.15 Inches
Width3.15 Inches
Part Number413-az

7. Camco


Camco TST Ultra-Concentrated Orange Citrus Scent RV Toilet Treatment Drop-Ins, Formaldehyde Free, Breaks Down Waste And Tissue, 30-Pack 41183, Septic Tank Safe

Camco #ad - Ultra concentrated formula: The toughest odor stopper; Just one drop in treats up to a 40 gallon tank. Not made with bronopol: Does not contain the toxic, formaldehyde releasing ingredient bronopol. Great smell: fresh citrus scent. Quantity: 30 drop ins/container. Essential for rv black water holding tanks: Eliminates odors and helps break down waste and tissue in your RV's black water holding tank. Safe for all septic tanks: Drop Ins are RV and marine approved and are 100% biodegradable.
BrandCamco #ad
ManufacturerCamco #ad
Height4.76 Inches
Length4.42 Inches
Weight1 Pounds
Width5.87 Inches
Part Number41183
WarrantyContact manufacturer



Caravan RV Sensor and Tank CLEANER, Fix sensors, bio-enzymatic plumbing solution, enzyme formula, RV & marine, clear toilet and tank clogs, black tanks

CARAVAN #ad - Fast: enzymes will immediately begin multiplying. Ok to travel and use toilet while soaking. Most tanks clear overnight, but older or poorly maintained tanks with heavy buildup will take longer.

Enzymes break down more complex molecules into something easily digested by the activated cleaners, sludge, blockages, completely eliminating sewer odor, human waste and all brands of household toilet paper. Agitation travel, pour, while not required will increase cleaning success. Convenient: simply shake, rinsing and longer soak period, flush and let soak. Powerful: 95% successful clearing stuck tank gauges and clogs.
BrandCARAVAN #ad
ManufacturerCaravan #ad
Height5 Inches
Length7.5 Inches
Weight2.31 Pounds
Width2 Inches
Part NumberCAR131



Happy Campers Organic RV Holding Tank Treatment, 18 treatments

HAPPY CAMPERS #ad - Liquify: waste solids and most ordinary household tissue no expensive special tissue needed. Odor free: absolutely no sewer smell. Effective: in extreme hot and cold temperatures over 100° F.
ManufacturerRV Concepts #ad
Height4.5 Inches
Length3.5 Inches
Width4.25 Inches
Part NumberHC-18-oz

10. Thetford


Thetford 96682 Aquamax Summer Cypress 64 Oz

Thetford #ad - Safe - extensively researched and tested safe for all RV and marine toilets, holding tanks, and septic systems. Powerful - fast-acting, clogging, triple enzyme formula breaks down waste and tissue to prevent clumping, and tank residue. Smells great - fresh spring showers scent eliminates RV holding tank odor. A california compliant holding tank treatment. Campground friendly - Formaldehyde and bronopol free.
BrandThetford #ad
ManufacturerThetford #ad
Part Number96682