The 5 Best Clean Gray Tanks (2023 reviews)

It fits most drain outlets in motorhomes, campers, travel trailers, and 5th wheel rvs. It is a must have for draining, rinsing, filling and unclogging rv sewer tank. It also allows the user to empty the black tank, then "redirect " the gray water by closing the valve and opening both tanks. It has a back wash part to spray water back into the tank to flush everything out.

It is meant to leave on at all times. This would be a better design if the nozzle that sprays back into the tank isn't at an angle. It is easy to use and hook up, and really gives you a good view of what's coming out. It is a great addition for the trailer and an aid in keeping the black tank sensors clean.

Why We Like This:

Great for visualizing the tank cleaning
Very functional and much more effective at controlling flow than stock equipment
Makes it easy to flush gray tanks and hoses also
Works great to flush out gray and black water tanks

Best Runner up: Unique Clean Gray Tank

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This is an amazing cleaner for your Rv toilet tank. It is perfect for an RV toilet that needs a good flushing out especially when sensors are reading full when empty. This product is good for septic tanks. It can be used in a gray tank. It will dissolve the teepee in the tank, which is a buildup of undissolved toilet paper. This is a very strong chemical to break down toilet paper and other sludge. It is safe for all waste tanks. This is a must have for anyone looking to clean a neglected black tank in their rv.

Why We Like This:

Works great, liquidized everything that it needed to
Black tank gauge is giving accurate reading
One of the new comers and featured product

Best For Boat: Caravan Clean Gray Tank

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There are products dedicated to sewage ejector tanks that will work more effectivly. The black tank sensors have always shown 2/3 full, even when completely empty. This will agitate the cleaner, and fill your tank at the same time. The cleaner purports to biologically "digest" the film of yuck, leaving the sensor buttons clean and maximizing the signal integrity. This product works as long as you continuously use it.

These sensors are submerged in the yuck, a circuit senses this and indicates the relative level for that tank. Having your sensors working correctly gives you the confidence you need to continue living life, without worrying if the tank will be backed up.

Why We Like This:

Black tank sensors and odor fixed
Rinse and fill tank with enough water to cover sensors
Working properly ( maintenance ) use a good bacteria based tank treatment
Easy to use, cleaned both sensors

Best For campground: Unique Effective Sensor Cleaner

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Unique offers a variety of tank for personal choice and yet maintaining quality in all the variants. The RV Digest It is an additive to put primarily in your black water tank to break down solid waste matter and help prevent odors. It is the single best product for dissolving solids but a slight odor is noticeable at times. The sensors are clean and the readings are correct. If you ask anyone who’s meticulous about keeping your black and grey tanks clean this is the product for you.

The plastic bag contains liquid from the bottle as well as the bottle. The water/cleaner must completely cover the sensor. This does not give your system a good smell, but there's no bad smell because everything cleaned so well. It does a great job dissolving crud.

Why We Like This:

Works better when it's hot outside
Lot of satisfied buyers

Best PREMIUM: Camco Clean Gray Tank

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Camco makes quality products for RVing, boating, camping, towing, tailgating, grilling and more. The Ready-to-use kit includes everything needed to transport waste from your rv or trailer to a dump station when you’re parked too far away for an rv sewer hose kit includes accessories to clean, maintain and store the tote tank when not in use. The Removable steel tow adapter allows you to easily roll the tote tank as you would with a suitcase or luggage.

Camco's tst max orange drop-ins are essential for helping control (not masking) odors, as well as breaking down waste and tissue in your black water holding tank. It features grooves to securely strap it in place. Large, heavy-duty, no-flat wheels with bearings make transporting the tow tank smooth and effortless.

Safe for all septic tanks, the Drop-INs are made with an ultra-concentrated formula that does not contain the toxic, formaldehyde-releasing ingredient bronopol. These are good for both rv and marine use.

Why We Like This:

Eliminates odors and helps break down waste in the rv holding tank
Does not contain the toxic, formaldehyde-releasing ingredient bronopol
Convenient and easy-to-use, simply drop one drop-in down your toilet and flush