The Dometic 300 Series Showdown: Which RV Toilet Reigns Supreme?

If you’ve ever wandered through the world of RV bathrooms, you already know there are two kinds of people:

1. Those who think “a toilet is a toilet,” and

2. Those who know the Dometic 300 Series has layers — like an onion, but less emotional.

Today, we’re breaking down the entire Dometic 300 family, comparing the 300, 301, 310, 311, 320, and 321 models so you can find the perfect throne for your rolling kingdom.

Whether you want lightweight convenience, ceramic luxury, or a full residential-style experience, there’s a Dometic 300-series toilet with your name on it.

Dometic 300 – The Lightweight Overachiever

If you want a dependable RV toilet that doesn’t add unnecessary weight, the Dometic 300 delivers. This all-plastic model is famously light (about 8 lbs!) and flushes with surprising power thanks to its gravity-fed design.

Why RVers Love It:

• Ultra lightweight

• Budget-friendly

• Compact and versatile

• Surprisingly powerful flush

Best Fit: Entry-level RVs, weekend warriors, and anyone trying to keep weight (and cost) down.

Dometic 301 – The “Let’s Make This Work” Model

The 301 is the Dometic 300’s helpful sibling — same durable plastic build, same design, but engineered for RVs with a different discharge configuration.

Why RVers Choose It:

• Same benefits as the 300

• Works with alternate plumbing layouts

• Easy replacement for specific OEM setups

Best Fit: If your original toilet was a 301, stick with it — your installation will thank you.

Dometic 310 – The Budget Luxury Option

Here’s where the porcelain dreams begin. The Dometic 310 is famous for its ceramic bowl and powerful swirl-jet flush, which actually rinses the bowl instead of just “hoping for the best.”

Why RVers Love It:

• Real ceramic bowl

• Residential feel

• Swirl-jet rim for true bowl coverage

• Foot-pedal flush that’s smooth and controlled

Best Fit: RVers who want an upgrade in comfort without going full spa-mode.

Dometic 311 – The 310’s Flexible Twin

Think of the 311 as the 310’s installation-friendly twin — same ceramic build, same swirl flush, just designed for different plumbing layouts.

Why RVers Choose It:

• Ceramic luxury

• Works in unique discharge setups

• Ideal for replacing a factory-installed 311 or 310 variant

Best Fit: RV bathrooms that need ceramic comfort in a very specific configuration.

Dometic 320 – The Full Residential Throne

Now we’re talking. The Dometic 320 is the superstar of the 300 series. With an elongated bowl, residential height, and a true porcelain design, this toilet feels so much like home you may forget you're camping.

Why RVers Love It:

• Premium elongated bowl

• Taller, residential-style height

• Superior comfort and stability

• Ceramic construction throughout

Best Fit: Full-time RVers, tall users, and anyone who refuses to compromise on bathroom comfort.

Dometic 321 – The Compact Luxury Option

Love the 320 but don’t have the space? The Dometic 321 gives you the same ceramic quality and seat height but with a smaller bowl footprint — perfect for tight RV bathrooms.

Why RVers Choose It:

• Residential height

• Compact design

• Same ceramic comfort as the 320

• Great for smaller rigs or curved walls

Best Fit: Vans, compact RVs, and mid-size coaches needing a slimmer profile.

Final Verdict: Which Dometic 300-Series Toilet Should You Pick?