Your RV Tank Cleaning Questions Answered
Answers to common questions about professional RV tank cleaning
We know there’s a lot of curiosity surrounding our methods… how we do what we do, will it be messy, how long it’ll take, what the heck a “poop pyramid” is, and so on. Given that, we’ve put together a quick guide to address some common questions about hydrojet tank cleaning. These are the latest inquiries we’ve received—along with our responses—from fellow RV enthusiasts, site visitors, and folks we’ve met at events and rallies across the country.
Your RV Tank Cleaning Questions Answered
Answers to common questions about professional RV tank cleaning
We know there’s a lot of curiosity surrounding our methods… how we do what we do, will it be messy, how long it’ll take, what the heck a “poop pyramid” is, and so on. Given that, we’ve put together a quick guide to address some common questions about hydrojet tank cleaning. These are the latest inquiries we’ve received—along with our responses—from fellow RV enthusiasts, site visitors, and folks we’ve met at events and rallies across the country.
Do grey tanks need cleaning, too?
Absolutely! Grey tanks often get worse buildup than black tanks thanks to residue from food, soap, hair, toothpaste, and even mold. Regular cleaning helps avoid smells and false sensor readings.
What is a "poop pyramid" in my black tank, and how do I prevent it?
A “poop pyramid” forms when waste and toilet paper pile up beneath the toilet inside your black tank, often caused by insufficient water use. To prevent this, always add a generous amount of water before and during each use.
Do I need full hookups to get my tanks serviced?
Yes, your RV must be connected to electricity, water, and sewer. If you’re not on full hookups, many parks offer a temporary space for servicing—just ask your host.
Do I need to be present while you clean my tanks?
Yes. The service is done while you wait, and we’ll walk you through the process and offer maintenance tips.
Why are my tank sensors giving false readings?
Most sensor issues come from waste buildup on the probes. In rare cases, it’s an electrical issue. Cleaning the tanks typically restores sensor function.
Is professional tank cleaning really necessary?
Yes. Over time, tanks collect layers of waste, grease, and mineral deposits like struvite that DIY methods can’t fully remove. Professional hydro-cleaning eliminates stubborn buildup, restores sensor accuracy, prevents odors, and minimizes clog risks.
Why do my tanks smell bad?
Leftover sludge and grime are the usual culprits. Odor-masking chemicals just cover the problem—cleaning removes it.
How do you clean my tanks - and it is safe for the tanks?
We use a safe hydro-jetting system—no pressure washers. A specialized pump allows us to scour the inside of your tanks without causing damage. The “one-two” punch offered by hydro jetting and back-flushing gets your tanks factory clean!
Did I inherit waste from the previous RV owner?
Most likely. Dealerships often flush tanks with chemicals but don’t deep clean them, leaving behind waste from prior use.
How often should I schedule a tank cleaning?
At least annually, more often if you live full-time in your RV. We’ll also share maintenance tips to help between visits.
Will your service make a mess?
We work cleanly and with care. Our setup is self-contained, though a bit of water may hit the ground. We respect your space.
Will you need to go inside my RV?
Not usually. We’ll only enter if you have a toilet clog that needs to be cleared from the inside.
Will a foul odor or bad sensors mean I need to replace my tanks?
Almost never. These problems are usually solved with a proper deep cleaning.
Can I watch you do your work?
Of course. We’re happy to explain the process and offer advice for keeping your system running well between cleanings.
When is the best time to clean my tanks?
Once a year is ideal. Also consider a cleaning before winterizing to keep things fresh.
Do store-bought tank sprayers work?
Somewhat, if the buildup is minimal. But most work at just 40–50 PSI—far below our professional 1,500 PSI equipment.
How long does cleaning take?
Usually one to two hours, depending on tank condition and number of tanks. We take the time needed to do it right.
How can I tell when the tanks are truly clean?
You’ll see it for yourself through our clear outflow connector—when the water runs clean, the job is done.
Do you use chemicals?
Nope. Just water. Safe for tanks and the environment.
Can’t I just clean the tanks myself? Why bring in a professional?
Sure, regular dumping and rinsing helps—until it doesn’t. Many RV owners follow the typical routine: drain the black tank, run the built-in flush until things look clear-ish, then rinse everything down using grey tank water. But eventually, those sensors start acting up, showing ⅓ or ⅔ full even when you know the tank’s empty. That’s because leftover sludge settles at the bottom and clings to internal sensors and corners—places your onboard rinse system can’t reach. Water follows the easiest route out and misses those problem areas entirely. Over time, buildup of paper, grease, and solids trick the sensors into thinking the tank’s still full. That’s when it’s time to call in a tank specialist.
What’s your cancellation policy?
We don’t take deposits to book a service. If you need to reschedule or cancel, just give us as much notice as you can.
What’s involved in the tank cleaning process?
We access your waste system from the standard external outlet and work our way up through the piping directly into the tanks. Using a specialized pressure water system (tailor-made for our use) we scour the interior to strip away waste build-up and restore functionality. For most RVs, the process runs between two to four hours, though extremely dirty tanks may take longer. The result? Every tank gets the same outcome—spotless, top-to-bottom.
Why should I hire Park and Purge?
We know how critical reliable tanks are. That’s why we go beyond just blasting them clean—we inspect your tank valves, talk through long-term tank care, and treat your rig like it’s our own.
When do I pay for service?
There’s no charge to book. You only pay once the job is done.
Do I need to haul my RV to your location?
Nope—we’re mobile and come to you. Just make sure your campground is aware we’re coming.
Where do you operate?
Still have questions?
Ask away using the form found on our “Contact” page. We’ll respond as soon as possible!