Posted by Dave on Oct 29th 2026
Full Comparison of all Dometic RV Gravity Flush Toilet Models
With model names like 400, 410, 420, 510, and Concerto (plus a low-profile version of most of them), it’s easy to get lost in Dometic’s lineup. The differences come down to bowl material, seat shape and height, flush type, and price.
This guide compares every Dometic gravity-flush toilet we carry so you can pick the right one for your RV — including what to buy if you’re replacing an older 300, 310, or 320.
| If you want… | Choose | Starting at |
|---|---|---|
| The lowest price + an easy fit (7-5/8" rough-in) | Dometic 400 / 401 | $226.99 |
| A porcelain bowl for the money | Dometic 410 / 411BEST VALUE | $309.95 |
| The most residential feel in a compact toilet | Dometic 420 / 421 PlatinumTOP PICK | $449.95 |
| Premium full-size comfort, hand sprayer, or pressure-assist flush | Dometic Traveler 500 Series | $539.99 |
| The ultimate — including 12V electric flush | Dometic Concerto 4310 / 4410 | $2,795.49 |
| To replace a discontinued 300, 310, or 320 | See the replacement chart | — |
The entire 300 / 310 / 320 line has been discontinued and replaced by the 400 / 410 / 420 series. The good news: the new models fit a 7-5/8" minimum rough-in — less room than any of the old models needed — so they drop right into the same space.
| If you have a… | Replace it with | Still repairing yours? |
|---|---|---|
| Dometic 300 (standard height) | Dometic 400 | 300 parts diagram |
| Dometic 301 (short) | Dometic 401 | 301 parts diagram |
| Dometic 310 (ceramic, round) | Dometic 410 | 310 parts diagram |
| Dometic 311 (low profile) | Dometic 411 | 311 parts diagram |
| Dometic 320 (ceramic, elongated) | Dometic 420 Platinum | 320 parts diagram |
| Dometic 321 (low profile) | Dometic 421 Platinum | 321 parts diagram |
Parts for the 300, 310, and 320 are still available — use the parts diagrams above. Leaking between the bowl and base? Read this first.
The Dometic Lineup at a Glance
- Dometic 400 / 401 — from $226.99
- Dometic 410 / 411 — from $309.95
- Dometic 420 / 421 Platinum — from $449.95
- Dometic Traveler 500 Series — from $539.99
- Dometic Concerto 4310 / 4410 — from $2795.49
The 400, 410, and 420 share a universal 2-bolt mount and a 7-5/8" minimum rough-in, so they fit almost any RV bathroom. Each also comes in a low-profile version (model number ending in 1). The Traveler 500 series and Concerto are larger, premium toilets for RVs with more room.
Side-by-Side Comparison
| 400 | 410 | 420 Platinum | Traveler 500 | Concerto | |
|---|---|---|---|---|---|
| Bowl | Plastic | Porcelain | Porcelain | Porcelain | Ceramic |
| Seat | Round, soft-close | Round, soft-close | Elongated, soft-close | Elongated, wood seat | Elongated |
| Seat height | 18" / 13-1/2" (401) | 18" / 13-1/2" (411) | Standard / low (421) | 18-3/4" (510HPS) · 14-5/8" (511H) | 19" |
| Flush | Foot pedal | Foot pedal | Foot pedal | Foot pedal · pressure-assist (510+) | Manual or 12V electric |
| Rough-in | 7-5/8" min. | 7-5/8" min. | 7-5/8" min. | See product specs | See product specs |
| Best for | Budget, tight spaces | Best value porcelain | Most residential feel | Premium full-size comfort | Luxury / electric flush |
| Starting at | $226.99 | $309.95 | $449.95 | $539.99 | $2,795.49 |
| Parts diagram | — | — | — | View | View |
| Shop | See models | See models | See models | See models | See models |
Specs from Dometic product information. Seat heights shown as standard / low-profile version. Measure before you buy — see our rough-in guide.
Key Differences Explained
Bowl Material
- Lightest weight
- Lowest cost
- More prone to staining over time
- Easier to clean
- More durable and odor resistant
- More “residential” look and feel
Seat Shape & Height
- Round: 400 and 410 — more compact
- Elongated: 420 Platinum, Traveler 500 series, and Concerto — more comfortable, house-style seating
- Low profile: 401, 411, 421, and the 511H sit lower for tight spaces or under a window or cabinet
Flush Type
- Foot pedal: 400, 410, 420, and the Traveler 510HPS / 511H — simple and no electrical connection needed
- Pressure-assist: Traveler 510+ — a stronger flush
- 12V electric flush: Concerto 4410 and select 4310 models — push-button convenience (requires 12V power)
Model-by-Model Breakdown
Pick yours below — each card goes straight to that exact toilet.
Dometic 400 / 401 from $226.99
The 400 has a full-size, residential-style round soft-close seat on a lightweight plastic toilet that fits a 7-5/8" rough-in. The 401 is the low-profile version. It replaces the discontinued 300 / 301.
| Bowl | Plastic |
| Seat | Full-size round, soft-close |
| Seat height | 18" (400) · 13-1/2" (401) |
| Rough-in | 7-5/8" minimum, universal 2-bolt mount |
Dometic 410 / 411 from $309.95
The 410 keeps the 400’s compact 7-5/8" footprint and adds a porcelain bowl and soft-close seat. The 411 is the low-profile version. It replaces the discontinued 310 / 311.
| Bowl | Porcelain |
| Seat | Full-size round, soft-close |
| Seat height | 18" (410) · 13-1/2" (411) |
| Rough-in | 7-5/8" minimum, universal 2-bolt mount |
Dometic 420 / 421 Platinum from $449.95
The 420 Platinum puts an elongated porcelain bowl and soft-close seat on the same 7-5/8" universal mount. The 421 Platinum is the low-profile version. It replaces the discontinued 320 / 321.
| Bowl | Porcelain, elongated |
| Seat | Elongated, soft-close |
| Rough-in | 7-5/8" minimum (8" recommended for the 421) |
Dometic Traveler 500 Series from $539.99
The Traveler 500 series are full-size porcelain toilets with elongated seats for RVs with more room. The 510HPS adds a wood seat and integrated hand sprayer, the 510+ uses a pressure-assist flush, and the 511H is the lower-height version.
| Bowl | Porcelain |
| Seat | Elongated |
| Seat height | 18-3/4" (510HPS) · 14-5/8" (511H) |
| Flush | Foot pedal · pressure-assist (510+) |
Dometic Concerto 4310 / 4410 from $2795.49
The Concerto is Dometic’s premium gravity toilet: a ceramic bowl, elongated seat, and 19" seat height, available with manual or 12V electric flush.
| Bowl | Ceramic |
| Seat | Elongated |
| Seat height | 19" |
| Flush | Manual or 12V electric |
- Rough-in: measure from the back wall to the center of the floor flange — here’s how.
- Height: standard vs. low profile — match your current toilet unless you want a change.
- Seat shape: elongated seats need more front-to-back space.
- Power: electric-flush Concerto models need a 12V connection.
Our Recommendation
For most RV owners, the 410 is the sweet spot — porcelain bowl, soft-close seat, and a 7-5/8" rough-in that fits almost anywhere. Want the most residential feel in a compact toilet? Go with the 420 Platinum.
On a budget, the 400 gets the job done. And if you have the space and want the best, look at the Traveler 500 series or Concerto.
Frequently Asked Questions
Related RV Toilet Help
- RV Toilet Rough-In Distance Explained
- How Hard Is It to Replace an RV Toilet?
- Which Thetford Gravity Flush Toilet Is Right for Me?
- Can You Replace the Base-to-Bowl Seal on a Dometic 300?
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