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Unique RV Digest-It+ Extra-Strength Ultra-Concentrate Black Tank Treatment for RVs - Gallon Refill - 128 RV Toilet Treatments, Eliminates Smells, Liquefies Waste, CA Compliant 128 oz.

  • Based on 9,913 reviews
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Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon

Arrives Tuesday, May 13
Order within 19 hours and 28 minutes
Available payment plans shown during checkout

Style: Ultra-Concentrate


Size: 128 Fl Oz (Pack of 1)


Features

  • Faster and more effective waste and RV tissue digester. RV Digest-It+ Ultra-Concentrate RV black tank treatment breaks down waste and all brands of toilet paper, preventing pyramid plugs and making dumping easier.
  • The Power of Plus. Our strongest complete RV tank treatment in a large, gallon size so you can refill your no-fuss bottle. The 128 ultra-concentrated treatments are significantly stronger than RV Digest-It Classic. Breaks down clog-causing waste and eliminates porta potty smells and sewer stink in your tank.
  • Prevents sensor probe problems. Stops black water tank sensor probes from misreading by liquifying waste before it builds up and clings to probes. Digests grease, oil, and food debris in gray tanks.
  • RV Digest-It Plus Ultra camper toilet treatment is designed to work with The Unique Method to ensure clog- and stench-free camping, no matter what your style is: hookups, dry camping, full-time, extreme heat.
  • RV Digest-It+ Ultra-Concentrate is Unique. Family-owned, formulated, and manufactured in Arvada, CO. Backed by experts eager to help you solve tough wastewater problems. Campground- and home-septic safe. California compliant. Recommended by RV techs. Carried by thousands of retailers from coast to coast.

Brand: Unique


Item Form: Liquid


Scent: Clean Fresh, Earthy smell due to the concentration of active ingredients


Specific Uses For Product: RV Waste Water Holding Tank Treatment


Item Volume: 128 Fluid Ounces


Manufacturer: ‎Unique Manufacturing & Marketing


Brand: ‎Unique


Item Weight: ‎8.81 pounds


Package Dimensions: ‎11.89 x 6.14 x 6.1 inches


Country of Origin: ‎USA


Item model number: ‎418-AZ


Special Features: ‎Bio-enzymatic


Date First Available: September 3, 2024


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • PROOF IS IN THE PUDDING-LIKE DIGESTED DOG KIBBLE
Style: Classic Size: 32 Fl Oz (Pack of 1)
A few years ago, I conducted a similar experiment, comparing black and gray water tank treatments using dog poop. In that experiment, TankTechsRx came out the winner over the other product (I’m sorry, I no longer remember that product’s name), as it did a much better job of reducing the odor. I recently encountered this product, which had good reviews, so I bought a bottle of it—Unique RV Digest-It—to compare with my TankTechsRx. Unique showed how their product would digest dog kibble, and that it has a similar composition to human waste: protein, fat, carbohydrate. So I tried it myself. The experiment was this: I mixed a capful of each product with water to nearly fill a small glass, and then I placed five pieces of small dog food kibble in each glass and let them sit. The photo showing the glass with the brown colored liquid is the one with TankTechsRx product, which is naturally brown. Result: Within 12 hours or so, the Unique RV Digest-It had reduced the kibble to a sludge at the bottom of the glass, whereas the glass with the TankTechsRx still held solid chunks of kibble. The odor was also different, with the TankTechsRx glass smelling a bit funky, while the Unique RV Digest-It glass had a faint, but rather pleasant, almost floral, smell to it. I will be using Unique RV Digest-It from now on in my gray water tank. We have a composting toilet, so we don’t use a black water tank. However, we have been spraying a mixture of water and TankTechsRx in our composting toilet, which has seemed to help with the composting process and odor control. I will now be trying the Unique RV Digest-It in the same way, expecting good results. I would surmise from my experiment that Unique RV Digest-It would work well in a black water tank and accomplishing what it advertises: 1. BREAKS DOWN SOLID WASTE INSIDE TANKS. Liquifies human waste and all brands of toilet paper. Digests residual sludge from years of build-up. Works in black and gray tanks. 2. ELIMINATES TOILET & TANK ODORS without masking. Extra strength activated cleaners eliminate odors at their source without covering them with overpowering perfumes. 3. HELPS PREVENT SENSOR MALFUNCTION. Cleans and removes solid waste and paper before it can cling to sensor probes, preventing misreads. Yes, I have no association with either company. Yes, I suggest others give Digest-It a try. ... show more
Reviewed in the United States on October 24, 2021 by Titan's Friend Titan's Friend

  • Working great.
Style: Classic Size: 32 Fl Oz (Pack of 1)
Breaks everything down quickly. Has a good slight smell that's not overbearing, just pour a little down the toilet and your done.
Reviewed in the United States on October 15, 2024 by Jeremy Lindley

  • Works great
Style: Extra-Strength Size: 32 Fl Oz (Pack of 1)
Only product I use for the Black tank!
Reviewed in the United States on November 17, 2024 by Dmc

  • Excellent but too expensive!
Style: Extra-Strength Size: 32 Fl Oz (Pack of 1)
I found this product for $10.00 less at that Big Store that starts with a W.
Reviewed in the United States on August 28, 2024 by Deklyn

  • Got rid of smell in bathroom
Style: Classic Size: 32 Fl Oz (Pack of 1)
I found this product reviewed on YouTube by some RV'ers so I thought I'd try it. Our toilet was starting to smell even though we are very conscious of dumping regularly and using treatment. One thing that particularly caught my eye was a claim that it cleaned the sensors. I could never get the lights on my panel to say the tank was empty. This product fixed the smell and my tanks now show empty. ... show more
Reviewed in the United States on October 1, 2024 by Bob Bell

  • Does the job
Style: Extra-Strength Size: 32 Fl Oz (Pack of 1)
Wouldn't skip this one. Y’all know “the smell” if you spent anytime in an RV overnight. It is horrible. And it lingers. But this is so far the only product we can find that works. Just make sure you put at least 3 bowls of water in after you empty your black tank and then add the recommended amount of this stuff. The price is fair. No odor I can tell of. Easy to use. Would recommend. ... show more
Reviewed in the United States on November 26, 2024 by Peachy

  • Fair
Style: Extra-Strength Size: 32 Fl Oz (Pack of 1)
When I first used this product I thought it was pretty good mainly because it seemed to be very effective at eliminating odor. However, I have found that it does not do a good job at breaking down toilet tissue. This causes the tissue to clog up and not allow the tank to empty. I have had to flush buckets of water down the toilet to help the clog break free. Unfortunately this goes against the advertising claim for this product. I will use up the remaining product I have, but I will not be purchasing it again. ... show more
Reviewed in the United States on September 22, 2024 by Debbi Labbe

  • Must Have for RV
Style: Classic Size: 32 Fl Oz (Pack of 3)
one of the best i have used, keeps smell down, helps to keep rv tank clean and operating smoothly, easy to use, good price, i have used quite a few differnt products untill i started using this one, have and will probably stay with this unless someone can show me something better
Reviewed in the United States on September 1, 2024 by David Saltel

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