• HC Extreme

Happy Campers Extreme Cleaner for Holding Tanks

$23.45 $22.45

In stock

Happy Campers EXTREME CLEANER for
RV & Marine black/gray waste holding tanks:


1) Cleans poor working sensors.
2) Softens & removes solid buildup.
3) If your present tank treatment has quit working.
4) You just bought your RV & want to super clean the tanks for a fresh start.
5) A great product for an annual clean out, especially when winterizing.

Recommended for use in 30-60 gallon tanks.

100% Satisfaction Guaranteed!

In stock

Product Description

Happy Campers EXTREME CLEANER for RV & Marine black/gray waste holding tanks:

This 18oz container treats one holding tank. (Each Happy Camper Extreme Cleaner Container is 1 Treatment). This Extreme Cleaner cleans, softens, helps dissolve all types of waste, toilet tissue, crud, sludge, light corrosion & scum buildup in holding tanks. Safe & effective if used according to instructions.

Industrial Strength: Highest concentrated, most active (powerful) waste tank cleaner on the market today. The Happy Camper Extreme Holding Tank Cleaner sets a new standard for RV industry, repair centers, rental companies, & full-time RVers.

The Happy Camper Extreme Holding Tank Cleaner is recommended for winterizing, annual clean out, removing persistent odors caused by chemicals or medications obstructing your tank treatment.

DIRECTIONS: Much like clothes in a washing machine, rinsing & agitation does most of the work, EXTREME CLEANER simply softens & helps dissolve sludge & crud in holding tanks. Use on-board or flexible down-the-toilet rinser for best results.

Tank Cleaning: Effectiveness requires some type of agitation (tank rinser sprayer, long curvy drive, etc.)
• 1. Dump & thoroughly rinse tank
• 2. Mix entire container into large bucket of hot water till fully dissolved
• 3. Pour into toilet (sink for gray tank)
• 4. Fill tank with clean water to ½ (completely fill if stationary)
• 5. Aggressively agitate (long curvy drive) (if stationary soak overnight minimum)
• 6. Dump & thoroughly rinse immediately upon completion agitation & rinsing is key

Note: Waste tank sensors are historically temperamental, heavy cleaning will usually (not always) help restore scum crusted sensors. Stationary units require more rinsing with less success. Will not dissolve “wipes” or fix broken or corroded probes. Not a tank treatment or deodorant, to keep odor free use Happy Campers Organic Holding Tank Treatment.


Item Weight: 1.06 pounds
Product Dimensions: 3.5″ x 3.5″ x 4.5″
Manufacturer Part Number: EC-18-oz
Upc: 186045000066

Additional Information

Weight 1.06 lbs
Dimensions 3.5 x 4.2 x 4.5 in



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