Black Water Tank Clogged with Toilet Paper: Unclogging Methods and Prevention

Clogged black water tanks are a common issue for RV owners, and toilet paper is often the culprit. Typically, a clogged black water tank can be caused by excessive toilet paper usage, especially if you're using a lot of it.

You should aim to use 1-2 sheets of toilet paper per use to minimize the risk of clogging. This is especially true for RVs with smaller tanks.

A clogged black water tank can be a messy and smelly problem, so it's essential to know how to unclog it. The good news is that there are several methods to try.

Clogged RV toilets and black water tanks are a common issue for many RVers. The main reasons for a clog in an RV sewer pipe are the twists and turns/elbows, and the type of waste that's flushed down the toilet.

Proper waste breakdown is essential to prevent clogs. Your various solid wastes won't break down without help, so doing nothing with your RV toilet and sewer system will lead to a clogged toilet.

Recommended read: How to Make Toilet Water Go down

Extreme weather conditions can also cause clogs. Your RV toilet is more likely to get clogged in extremely cold or hot weather, as the various wastes solidify more regularly in these conditions.

Hot weather is a worse culprit of a clogged RV sewer system. It will evaporate necessary liquids found inside the black tank, making it difficult to drain the tank properly.

A clogged black tank isn't anyone's favorite thing, but it's a common issue. Many companies have made products to assist with clogged toilets onboard an RV.

A sewer snake or even just a broom handle can work to unclog an RV black tank by sticking the tool down the toilet and using it to move things around.

You will want to be careful when using this method so you don't damage your plumbing.

Hot water might be enough to break up any clogs and get your wastewater moving once again. Boil water on the stove and pour it down your tank.

For your interest: Toilet Water Going down Slowly

Be prepared to deal with a gross smell when using a snake or hot water method.

To use a snake, stick the tool down the toilet and use it to move things around and hopefully get rid of the clog.

You can also try using hot water, but be prepared for a stinky situation.

A snake or hot water may not be enough to completely unclog the tank, so you may need to try a combination of methods.

If you're not comfortable using a snake or hot water, you may want to consider purchasing additional products to help unclog your RV's delicate sewer system.

For another approach, see: How to Unclog Toilet with Hot Water

Prevention is key when it comes to avoiding clogs in your RV black water tank. To keep your tank clean and clog-free, use sufficient water to flush and dump and clean the tank regularly and thoroughly.

Don't throw errant items into your RV toilet, as this can cause clogs. It's also crucial to never leave your black tank's gate valve open, even when hooked up to a sewer connection.

A different take: Is the Toilet Water Clean

You should clean your tanks before your RV sits for an extended period. This will prevent the liquid in the tank from evaporating and leaving you with solid matter that dries out and sticks to the tank.

Regularly using a holding tank treatment like Happy Campers can also help prevent clogs. Struvite, a type of scale that forms over time in waste pipes and tanks, can cause problems, but using a holding tank treatment can help prevent its formation.

Here are some essential steps to maintain your RV black water tank:

You can try using a septic system powder treatment like Rid-X to clean your blackwater tank. This should be done at least monthly, even if your tank isn't clogged, to prevent future clogs.

Rid-X is a popular brand that comes in a powder form and includes enzymes and natural bacteria to break down waste like grease, oils, proteins, and even toilet paper. You can get a month's worth for $6.88, a three-month supply for $13.88, or a year's worth for $73.66.

If you're looking for a cheaper alternative, you can try using vinegar and baking soda. Pour an entire box of baking soda into your black tank and then add a half gallon of vinegar. This chemical reaction may help loosen a clog, but it may not work for everyone.

If you're dealing with pyramid plugs, you can use an auger to break them up. This is a type of toilet snake that's safe to use in your blackwater tank line. Just be sure to use the hand-operated version to avoid piercing the tank.

If you don't have the time, budget, or opportunity to purchase additional products, there are home remedies you can perform to clear a clogged RV toilet.

Using too much toilet paper can easily clog the system, so be mindful of your usage.

You don't need RV-specific toilet paper, but using anything but toilet paper is just asking for trouble.

Pouring water into your blackwater tank and topping it off with ice can help dislodge stubborn waste and toilet paper.

Drilling into your blackwater tank is a last resort, so try the ice cube method first.

Pouring an entire box of baking soda into your black tank and adding a half gallon of vinegar can help loosen a clog.

The ice cube method may sound strange, but it's worked for many RV and camper owners.

Since it's a relatively affordable alternative to other harsher chemical products, give the baking soda and vinegar method a try.

It's always a good idea to test a new brand of toilet paper to see if it's RV-friendly, like Costco's Kirkland brand.

Using regular toilet paper in your RV black tank can lead to buildup and clogs.

Wipes, whether they're advertised as "flushable" or not, shouldn't be put into your home's plumbing system. They can clog pipes and cause a mess.

Some people swear by using wipes, even with their regular toilet paper. We've never been that way, but it's worth considering if you're someone who likes extra convenience.

Wipes can get caught at the sewer outlet, which can be a real problem to deal with. It's best to dispose of them in a covered trash can, just like you would with regular trash.

Keeping a small covered receptacle near the toilet is a good idea, especially if you're someone who likes to use wipes.

Hot water can be a game-changer when it comes to clearing clogs in your RV's black tank. Boil water on the stove and pour it down the tank, as this might be enough to break up any clogs and get your wastewater moving once again.

Using hot water is a simple and non-toxic approach to dealing with clogs, making it a great option for those who want to avoid harsh chemicals.

You can use a black tank cleaner to quickly and effectively unclog your RV's toilet. These chemical-based products are a popular choice among RVers, and some forms are easier to use than others.

Rid-X is a well-known brand that offers a powder treatment that can get rid of grease, oils, proteins, and even toilet paper. It's available on Amazon and comes in various supply sizes, including a single month's worth for $6.88.

A 1,500-gallon blackwater tank is the minimum size required for Rid-X to provide a deep clean. Each month's supply is roughly 9.8 ounces of powder, which includes enzymes and natural bacteria.

Happy Camper tank cleaner is another option that's easy to use and cost-effective. It's a highly concentrated water-activated mineral blend that eliminates odor and breaks down solid and liquid waste.

You can also use a Flexible Swivel Stik from Camco to clean your holding tank. This product is best used in RVs with an offset or away-from-the-toilet holding tank setup.

On a similar theme: How to Clean Toilet Water Tank

Using too much toilet paper can easily clog the RV sewer system. You don't need special "RV toilet paper", it's just overpriced and not necessary.

Our experience living in an RV full-time for nearly 20 years shows that regular toilet paper like Costco's Kirkland brand works just fine. If you have a different favorite brand, you can test it to see if it's RV-friendly.

Anything but toilet paper is just asking for trouble when it comes to clogging the RV toilet. Your various solid wastes won't break down without help, so doing nothing with your RV toilet and sewer system will lead to a clogged toilet.

Extreme temperatures can also cause clogging issues in your RV toilet. Hot weather is a worse culprit, as it will evaporate necessary liquids found inside the black tank.

A clogged black tank isn't anyone's favorite thing, but it's a common issue with many RVers. You're not alone in your struggle.