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Pumping Your Poo: How Macerating Toilets Make RVs Better!

Pumping Your Poo: How Macerating Toilets Make RVs Better!

RV toilets solve a unique problem, giving you a bathroom on the go. The challenge is what to do with the waste when there is no plumbing. An RV macerating toilet is a special type of toilet that gives you more options for toilet placement inside your RV and can make a stay in an RV more pleasant (i.e. no more toilet odors!). Read on to learn all about RV macerating toilets, and check out our recommendation for the best one on the market today!

What Is a Macerator Toilet? 

The most common toilet in an RV is the gravity flush toilet. This toilet uses gravity only to flush waste into the RV’s black tank. These toilets are very simple and work well; however, they have a few drawbacks. First of all the toilet must be located over the black tank or very close to it.

This can be a big limiting factor as to where a toilet can be placed in an RV. The second is that when the toilet flushes, it directly connects with the black tank and can belch sewer odors into the living space.  

Standard gravity-fed RV toilet
Standard gravity-fed RV toilet

Unlike a gravity flush toilet, a macerating toilet can be installed anywhere in the RV and is sealed from the black tank for minimal odors. A macerator toilet grinds up waste and paper, similar to a garbage disposal. These toilets have a pump that pumps the waste into the holding tank, so the toilet doesn’t need to be directly over the tank.

This makes them perfect for adding a second toilet to the RV or installing it where a gravity flush would not work. Examples of locations where a macerating toilet is required would be the forward area of a fifth wheel or over the Class A coach engine. 

How Do Macerating Toilets Work? 

Macerating toilets require electricity and work with motor-powered blades that grind up waste and paper at the push of a button. There are two different flush mechanisms on most RV macerator toilets: one for liquids and one for solids. The difference in the mechanisms is how much water is used for flushing the toilet. 

When solids are flushed, the macerator will grind them up before sending them to the holding tank. This makes emptying the black tank easier, promotes the breakdown of waste, and prevents clogs or build-up.

macerating toilet in an rv

Pros and Cons

An RV macerating toilet has some great benefits but also some drawbacks.

Pros of RV Macerating Toilets

An RV macerating toilet typically feels more like using a residential household toilet. Instead of flushing with your foot, a button is used, and the bowl will automatically fill with water.  Another big benefit of macerating toilets is they help prevent clogs in the RV’s black tank wastewater system. Because waste is ground up, normal toilet paper can be used as well.

The biggest pro to a macerating RV toilet is the ability to install it anywhere in the RV. This gives the RV manufacturers many more options for design, and you may find a layout that is more preferable. 

Cons of RV Macerating Toilets

One of the biggest cons to an RV macerating toilet is that they are not as efficient on water.  This is because they need to have a certain amount of water to run the flush cycle, and you have no control over it. This is not a problem with hookups but can be a limiting factor if you want to use the RV off the grid.  

macerating toilet in an rv

Macerating toilets also have more moving parts and could incur a more complicated and costly repair if something went wrong. Additionally, because the toilet requires power, you may not be able to flush it if the coach’s electrical system fails or your batteries die.  

Macerator Flush Toilet vs Exterior Macerator Pump

You may have heard of an RV macerating pump but not the toilet. An inline macerating pump can be used at the RV dumpsite and typically attaches to the exterior waste tank gate valve.

These macerating pumps allow you to dump on an incline because they actually pump waste. This is a popular modification many people make when wanting to dump their black tank at home. 

A macerating toilet will not pump your poo uphill, but it will grind your waste before it ever enters the holding tank. Inline pumps grind up waste as it leaves the holding tank. Dumping with an inline macerator pump is great for long-distance dumping or uphill dumping but almost always takes longer. 

Best RV Macerator Toilet: Thetford Tecma

Thetford 38457 Tecma Silence Plus 2 Mode 12V RV...
  • Amazingly powerful, yet virtually noiseless turbine pump
  • Remarkably elegant European styling
  • Solid porcelain base with molded plastic seat and cover

Although pricey, this macerating toilet is highly recommended for RVers. It is convenient, quiet, and features a push-button wall-mount for flushing. The push-button panel also has a sensor to let you know when your black tank is empty, half full, and full. The Thetford Tecma RV macerator toilet is made with a porcelain base and feels like a regular household toilet. 

Thetford is also well known for its macerating products and makes a great macerating adapter for dumping. 

Are Macerating Toilets Worth It? 

There’s no doubt about it – there are many benefits to using a macerator toilet in your RV. It protects your black tank from build-up and clogs, it feels like a residential toilet, and it is very simple to use. However, they do have the drawback of complexity, so you tend to find them on higher-end RVs. Ultimately, whether or not this toilet is right for you will depend on your wants and needs.

Macerating toilets aren’t your only RV toilet alternative. Composting toilets are another great option. Learn more here: What’s So Great About RV Composting Toilets?

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Tom & Caitlin Morton of Mortons on the Move gave up the stationary life for one where they are constantly on the move. They are full-time travelers, television hosts, and digital media producers.
They left their jobs, sold their house and possessions, and hit the road in September 2015 in their full-time “home on wheels”. Since then they have traveled the US, Canada, and even internationally by RV.
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Saturday 5th of August 2023

The Tecma toilet is great...till the controller goes out and then "nobody" has a replacement...nobody!!! HELP US!!! Somebody make a replacement!!

Mortons on the Move

Monday 18th of September 2023

Oh no I hate to hear that. They can usually be orderd online, but delivery might take a while. Our RV came with a spare because its so critical!


Sunday 28th of November 2021

Hi there My wife and I have a sailboat we plan to live at least part of the time. We have to use our shower hose to fill up the toilet We would like an easy way to flush and pump out when we are out far enough Can one add on macerator pump do both?

Mortons on the Move

Monday 29th of November 2021

Usually one pump cannot fill and dump, but adding one to dump your tank is very doable. If your toilet is a macerator already then you can get something like a whale gulper diaphragm pump to pump out.


Friday 3rd of September 2021

Regarding the cassette toilet and Boondocking in the wilderness? I guess if you have a good shovel you can go old school and just dig a deep home somewhere if there is no bathroom around...

Mortons on the Move

Saturday 4th of September 2021

In theory yes, in actuality it's frowned upon because many of the camping toilet chemicals need to be broken down in a holding tank or are toxic to plants and animals. It also would not be very fun to try and bury it. If you are looking to do this a composting toilet is a much better option as there are no chemicals and it's a much cleaner solution with the separation. We have been fertilizing trees on our property for years with our composting toilet.