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Here we compare the Dometic 320 vs 510 to see which RV toilet is better. Well, at least which one is best for your needs. We will compare the size, flush, and installation of these toilets. We will compare the value they are for the money and finish up with the pros and cons of each.
We’ll start by discussing the similarities between the Dometic 320 and the Dometic 510.
Dometic 320 vs 510 – Similarities
Quick Glance




The Warranty
They both come with a limited two-year warranty.
Rim shape
The are both elongated bowls.
Now let’s take a closer look at how these two Dometic toilets differ.
Differences Between Dometic 320 and Dometic 510
Installation
The Dometic 320 has a 2-bolt installation system and the Dometic 510 has a 4-bolt installation system.
Appearance
Dometic 320
It’s smaller than the 510 measuring 22 x 14.8 x 19.8 inches. It is also, significantly lighter weighing 37 pounds. It is elongated and has a rim around the edge to prevent spills.
Dometic 510
The design has the flush pedal on the left-hand side (as you are facing it). It is measures 26.3 x 20.87 x 25.16 inches and weighs 50 pounds. It has a long lasting high-gloss china finish that resists scratches and stains.
The Winner Is – A tie!
The Flush
The flushes are different between these 2 models.
Dometic 320
You will also have a gravity flush, but there is no 360º vortex flush pattern. It also has low flush technology, so it only requires 1 pint (.473 liters) of water per flush.
Dometic 510
This is a gravity flush that uses about a pint of water per flush.
The Winner Is – The 320!
The Flush Pedal
Both pedals work slightly different on these two models.
Dometic 320
If you only press the flush half-way down, you will add water to the bowl. This is only needed when flushing down solids. If you push the pedal all the way down, you will get a full flush. We like this feature as it saves water.
Dometic 510
If you only press the flush half-way up, you will add water to the bowl. This is only needed when flushing down solids. If you push the pedal all the way down, you will get a full flush. We like this feature as it also saves water.
The Winner Is – It’s a tie!
Value for Money
The price for RV toilets range anywhere from $100 to over $300. They vary primarily because of the materials that are used.
Dometic 320
Cheaper but good quality toilet.
Dometic 510
It is about $50 more than the 320, so it is on the expensive side of the RV toilet price spectrum. Overall, it is a more solid and larger but there is not much more to justify the price.
The Winner Is – The Dometic 320
Pros and Cons
Before we give our final verdict, here we will list some of the pros and cons of these Dometic toilets.
Dometic 320
Pros:
- The elongated shape for added comfort
- This wooden seat is a higher quality than plastic seats
- It hugs the wall and used less floor space in front
Cons:
- An 11-inch clearance is required from the flange so it may not fit in all RVs
The Final Verdict
Today’s winner was going to be the Dometic 320! (You saw that coming. Right?) The superior wooden seat, the low flush technology and the cheaper price put this model over the top.
The size and height of the Dometic 510 is suited for the larger RV or mariner traveler. So if you are traveling with the basketball team, this will be your toilet! That would be the only reason that we would consider recommending the 510 over the 320 in this case alone. Happy traveling!
The 320 model installation manual
The 510 model operation manual
The 510 model warranty request contact
Last update on 2023-01-18 / Affiliate links / Images from Amazon Product Advertising API