For nearly a decade, Kleen Tank has crossed the nation providing hydrojetting cleaning service to thousands of RV owners holding tanks. We have an impeccable reputation with RV owners, clubs and rally groups, and manufacturers. We’d love to count you as one of our happy customers. Here are more details on the tank cleaning services we provide.

Black holding tank cleaning
We all know what’s in an RV’s black holding tank. And we know you do your best to keep things clean in there. But most black tanks have significant build-ups of waste and other debris. Why? While your black tank sprayers do a good job of keeping things rinsed out, there’s no way for them to completely clean the tank.

Our 1500 PSI hydrojetting system literally blasts every surface in your black holding tank, cleaning off months — and even years — of debris, getting hard-to-reach areas like corners and the front bulkhead in the tank clean, and flushing out everything until the tanks are “factory kleen.” We follow up with a rinsing cycle that brings out anything the hydrojet didn’t flush out. We can even do a detergent deep cleaning on especially problematic black tanks.

Gray holding tank cleaning
While we think of black tanks as being the most dirty, an RV’s gray tanks can be almost as bad — or even worse! Gray tanks tend to accumulate molds and mildews, which thrive in the dark, damp, and warm environment inside a gray holding tank. Just as our 1500 PSI hydrojetting process scrubs your black tank clean, it also thoroughly cleans your gray tank, removing mold, mildew, food and human waste, and any other debris or build-up present in the tank.

How do we clean your tanks?
It’s one of the most freequently asked questions we get! Once you see how we do it, it seems almost…simple. We attach a special pipe fitting between your RV’s waste pipe and the flexible sewer hose and then guide a specially-designed cleaning head at the end of a flexible wand into your tanks. The 1500 PSI water pressure generated by our professional-grade water pump aggressively scrubs and cleans your tanks, pushing waste and debris back down through the flexible sewer hose and into the RV park’s waste collection and processing system.

What do we need to clean your RV’s tanks?
We use somewhere between 100 and 200 gallons of water to clean your RV’s holding tanks. For this reason, you will need to have your RV located at an RV park or resort which has full hook-ups: city-pressure water, 110 volt 15 amp electric, and — most importantly — waste collection and processing system. We CANNOT service your RV if you regularly use a waste pump-out service (it can damage our equipment), unless you have a 300+ gallon collection tank on-site (some RV parks have these in the ground or next to the RV at ground level).

What about the sensors?
In nine out of ten cases, we can usually get your RV’s tank sensors reading correctly again. Most tank sensors fail because of the tank additive you use. An additive that dissolves, breaks down, or otherwise digests waste is only making a tankful of pancake batter-like waste (especially in the black tank) that is sticky, thick, and almost impossible to get out.

In that one out of ten case, however, we just won’t be able to get your tank sensors working properly again. It could be a failure of the electronics in the sensors, rusted sensor probes, corroded or even disconnected sensors wires, or just a probe or mechanical failure. As much as we try, these circumstances mean your sensors will need to be replaced.

Tips for holding tank care and maintenance
We understand that we may not be able to service your RV sometimes: we’re not in your location nor have a dealer nearby, our schedule doesn’t match up with yours, or you aren’t on a full hook-up site. Here are some tips any RV owner can implement to care for their holding tanks:

  1. Empty your tanks when they are 75% to 100% full. This will allow water to create a vortex as it exits the tank, improving the cleaning process.
  2. Always attach and turn on your tank’s flush system when emptying your tank. The extra water and turbulence can help to move things along and improve the draining process.
  3. Practice the “two bowl” method when using your RV’s toilet. Fill the toilet bowl 75% of the way full before using, flush the bowl and any waste down, and then fill it up again with another flush afterward. It’s a good idea to refill the bowl to 75% for the next time you use it.
  4. Prime each tank by adding three to five gallons of freshwater after you empty it. Adding fresh water will increase the water-to-waste ratio in the tank.
  5. If you can, travel with five to ten gallons of fresh, clean water in the tank when leaving an RV park. The clean water will help to keep things lubricated and loosen any waste or debris in the tank.

Do you have a question that we can answer about your RV’s holding tanks or waste system? Are you ready to make an appointment? Perhaps you’d like to find a Kleen Tank dealer in your area. Whatever you need, Kleen Tank is here for you!



There’s no doubt about it: We know about RV holding tanks. And when you keep up to date on RVing topics, your RV works better, has fewer problems, and doesn’t cause you headaches. That’s why we publish a new blog article every week on some educational (or informative!) aspect of RVing (including holding tanks!). And if you’re coming to a rally we’re working at, we hope that you’ll take some time to review our articles and get a little informed. Because our best customer is the one who knows enough to ask questions!

Take a look at our recent educational articles. There’s something for everyone — and not all of the posts are about, well, you know! Enjoy.

Purchase Calgon Bath Pearls online at Kleen Tank's Store. Used in our RV tank solution, this is the stuff we recommend!