Dometic 300 Series Standard Height RV Toilet Review

by Dan | Last Updated: April 29, 2023

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Dometic 300 Series Standard Height RV Toilet

Two things go in tandem when planning for a trip with your Recreational Vehicle: Food and Nature Calls.

While there are other aspects to consider in your checklist, these two are, in my opinion, the most important.

This Dometic 300 Series Toilet Review, however, will not be about cups, mugs, and snacks.

The main aim here is to help you determine whether this throne is the perfect fit for your RV or not.

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About The Dometic 300 Series Standard Height RV Toilet

This is a residential style unit that comes available in White and Bone finishes. It is a lightweight standard height toilet that renders itself nicely as an ideal option for most campers and small pleasure vehicles.

The Dometic 300 Series boasts a thorough bowl clearing flushing action. This is made possible by its gravity assisted flushing system coupled with a powerful triple jet action and a drop away ball. It also has a valve which locks the waste instantly after each flush.

Importantly, this toilet encompasses almost all the aspects that its target market could be looking for in an RV toilet:

Regarding competition, the Dometic 300 is a good match to the Thetford Aqua-Magic V. It’s also another quality value RV toilet that requires a hard look. In fact, the Thetford is way cheaper than the Dometic 300 toilet and might make a good option for an RV owner on a shoestring budget.

However, this commode’s history of leak problems makes it a risky venture. So, if you don’t want to spend more on repairing leaks than buying a new model, I’d advise you to dig a little deeper and go for the Dometic 300 Series.

What’s In The Box?

Dometic 300 Series RV Toilet: Features And Benefits

Breezy Installation

I wish to begin with this feature since it solely determines whether the commode fits your RV or not. A good thing with the Dometic toilet is that it can replace any of your previous toilets that were not mounted on a raised platform regardless of whether it used a straight 2-bolt, 4-bolt, or angled 2-bolt configuration.

This, to me, is an excellent feature since you won’t have to slave on the internet looking for a perfect match for your previous model.

Again, mounting this commode only requires tightening two bolts only and also has a quick access water connection. By the same breath, the pedal cover and the base shroud come fitted into the pedal and base design. These features work together to make installation super easy for any DIY camper.

Home Comfort On Your Trips

The Dometic 300 isn’t so different from your home toilet. This model features the most coveted elongated bowl.

If you have used both the round bowl and the elongated toilets, then you might have confirmed the presumption that the latter are more comfortable especially for adults.

Elongated toilets are thought to be more comfortable because of the support they offer to your thighs, unlike the compact toilets. Men are also favored by the larger opening which minimizes spills and splashback.

Standard Height

Another thing that your family might appreciate about this toilet is its standard height. The Dometic 300 Series has a seat height of 18 inches. This height makes it an ideal model for the elderly and taller than average campers who may experience trouble sitting and standing up from a low profile toilet.


If there’s one thing that stands out with the Dometic 300 Series toilets is their lightweight design. A regular one piece commode could be as heavy as 100 pounds. Unfortunately, such a heavy toilet could add lots of weight to a Recreation Vehicle.

That’s the reason why this toilet’s weight at 8.2 pounds is really worth the mention. This feature means that you don’t add lots of unwanted weight to the vehicle. It also adds to its ease of installation.

Incredible Flushing Performance

This is, hands down, one of the main reasons why the Dometic 300 Series toilets have become the envy among RV campers since they they debuted. This unit uses a bowl clearing triple jet action to remove all waste from the bowl.

There’s more!

The Dometic 300 uses as low as 0.5 liters of water per successful flush. Let’s just agree that this is among the most water efficient and money saving toilets around.

No Unpleasant Odors

It’s also worth pointing out that this throne’s system has a watertight flush ball system that maintains clean water inside the bowl. This ball system works in tandem with a valve to keep all unwanted odors inside the black box. This is a unique feature that ensures that bad odors won’t be filling the vehicle from the toilet.

Dometic 300 Series RV Toilet: Pros & Cons


  • Elongated seat
  • Standard height accommodates the elderly and the tall
  • Foot pedal for hands-free flushing
  • Water efficient- uses 0.5 liters per flush
  • Lightweight and easy to install


  • Foot pedal flush mechanism might disadvantage the physically challenged

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Is This The Perfect Commode For Your RV?

The Dometic 300 Series toilet is one of the most recommendable toilets for Recreational Vehicles. Measuring 16 x 19.75 x 19.75 inches and weighing around 8 pounds, this Dometic portable toilet is ideal for campers and small pleasure vehicles.

Its standard height and elongated bowl design, on the other hand, further limits its usage to tall users. Short kids and adults who have trouble climbing ON and OFF a high throne might want to go with a low profile model like the Dometic 302301671 toilet.

Low Profile Toilet

This is yet another recommendable model from this brand. It boasts almost all the features that the previous commode has only that it’s somehow shorter and, therefore, ideal for short users.

However, it’s a few dollars pricier and might bleed your wallet more.

How To Choose The Perfect Toilet For Your RV

Finding the best toilet for your RV can be a little bit daunting than buying a toilet for your household bathroom. This is partly because there is so much info about home toilets than Recreational Vehicle commodes.

However, this isn’t an excuse for getting the wrong type. Consider the following tips when shopping for an RV toilet:

Travelling To Remote Places Without A Sure Supply Of Water And Electricity?

Go for either a cassette or a portable toilet. These models are ideal for use in the remotest areas since they don’t rely on electrical power in any way. Secondly, they have huge water reservoirs that eliminate the fear of camping in dry sites.

High Efficient And Excellent Flushers

Unlike your homestead toilet that has a direct connection to the water line, RV toilets rely on reservoirs that you fill before hitting the road. It’s, therefore, your obligation to save the water to serve you throughout the camping period. How do you do this? Simple – Consider a toilet that uses the least water possible to remove any of your heaviest ‘loads.’

Will there be physically challenged and seniors on-board?

If so, you might want to go with either a high profile commode or a low profile toilet mounted on a raised platform. This makes sitting and standing up from the throne easy and more comfortable.
On the same note, it might be important to steer clear of models with a foot pedal flush. Rather, go for a toilet with either traditional flush handle or touch-sensitive units.


The Dometic 300 Series Standard Height is one of the best additions to your outdoor activities, and I would not hesitate to recommend it to you. Among other things, I like that this commode’s ease of installation. I appreciate that it can replace almost any other toilet that is not installed on a raised platform regardless of its bolt system.

This model’s powerful flushing performance is also worth noting. I also like that the flushing action is triggered using a foot pedal thereby making the toilet a bit more hygienic and easier to use.

Lastly, and most important, you might love this unit’s elongated bowl and standard height design that tends to favor different users.

Dan is the editor in chief and founder of this site, after running into troubles with his own old toilet a while ago. Discussing toilets is not your everyday topic, so let’s talk toilets today.