Dometic 400 Essential
A light, drop-in replacement for most RV toilets at a modest price.
Amazon $195.69$195.69
The Dometic 400 Essential and the Dometic 300 Series Standard Height are evenly matched, rated 3.7 and 3.7. The Dometic 400 Essential leads on features and value. The Dometic 400 Essential costs $29.31 less ($195.69 vs $225).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Dometic 300 Series Standard Height
A light plastic Dometic that sips water, good for dry camping.
Amazon $225$225
Which should you buy?
- Choose the Dometic 400 Essential for features (soft-close seat, freshwater flush, water-saver flush, household-size bowl vs freshwater flush, water-saver flush, household-size bowl) and value ($195.69, against other toilets in its group vs $225, against other toilets in its group).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every RV gravity-flush boat or RV toilet; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dometic 400 Essential | Dometic 300 Series Standard Height |
|---|---|---|
| Overall rating | 3.7/5 | 3.7/5 |
| Value 25% | 65 $195.69, against other toilets in its group | 53 $225, against other toilets in its group |
| Flush water 20% | 50 flush volume not published (neutral score used) | 100 0.1 gal (0.5 L) per flush |
| Power draw 15% | 100 no electrical draw | 100 no electrical draw |
| Features 25% | 75 soft-close seat, freshwater flush, water-saver flush, household-size bowl | 55 freshwater flush, water-saver flush, household-size bowl |
| Warranty 15% | 25 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Dometic 400 Essential | Dometic 300 Series Standard Height | |
|---|---|---|
| Flushing | ||
| Type | Gravity | Gravity |
| Water per flush | - | 0.1 gal |
| Freshwater flush | Yes | Yes |
| Water-saver flush | Yes | Yes |
| Macerator | No | No |
| Control | Foot pedal | Gravity flush |
| Power | ||
| Draw at 12 V | None | None |
| Bowl and fit | ||
| Bowl size | Round, standard | Standard height |
| Bowl material | Plastic | Plastic |
| Household size | Yes | Yes |
| Soft-close seat | Yes | No |
| Seat height | 18 in | - |
| Rough-in | 7.6 in | - |
| Inlet hose | - | 1/2 in NPT |
| Build | ||
| Warranty | 2 years | - |