Dometic 320 Series Standard Height
#10 in RV gravity-flushFull review
A ceramic Dometic that stays frugal with water, the step up from the 300 plastic model.
Amazon $359.99$359.99
The Dometic 320 Series Standard Height is the better boat or RV toilet overall, rated 3.5 to 3.4. The Dometic 320 Series Standard Height leads on value. The Dometic 420 Platinum wins on features. The Dometic 320 Series Standard Height costs $60 less ($359.99 vs $419.99).
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 420 Platinum
#11 in RV gravity-flushFull review
The elongated porcelain top of the Dometic range for owners who want a full residential feel.
Amazon $419.99$419.99
Which should you buy?
- Choose the Dometic 320 Series Standard Height for value ($359.99, against other toilets in its group vs $419.99, against other toilets in its group).
- Choose the Dometic 420 Platinum for features (ceramic or porcelain bowl, soft-close seat, freshwater flush, water-saver flush, household-size bowl vs ceramic or porcelain bowl, freshwater flush, water-saver flush, household-size bowl).
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 320 Series Standard Height | Dometic 420 Platinum |
|---|---|---|
| Overall rating | 3.5/5 | 3.4/5 |
| Value 25% | 13 $359.99, against other toilets in its group | 0 $419.99, against other toilets in its group |
| Flush water 20% | 100 0.1 gal (0.5 L) per flush | 50 flush volume not published (neutral score used) |
| Power draw 15% | 100 no electrical draw | 100 no electrical draw |
| Features 25% | 80 ceramic or porcelain bowl, freshwater flush, water-saver flush, household-size bowl | 100 ceramic or porcelain bowl, soft-close seat, freshwater flush, water-saver flush, household-size bowl |
| Warranty 15% | 0 warranty not published, scored as none | 25 2-year warranty |
Specifications
| Dometic 320 Series Standard Height | Dometic 420 Platinum | |
|---|---|---|
| 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 | Foot pedal |
| Power | ||
| Draw at 12 V | None | None |
| Bowl and fit | ||
| Bowl size | Standard height | Elongated, standard |
| Bowl material | Vitreous ceramic | Porcelain |
| Household size | Yes | Yes |
| Soft-close seat | No | Yes |
| Seat height | - | 18 in |
| Rough-in | - | 7.6 in |
| Build | ||
| Warranty | - | 2 years |