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
The Dometic 420 Platinum is the better boat or RV toilet overall, rated 3.4 to 3.2. The Dometic 420 Platinum leads on features and warranty. The Thetford Aqua-Magic Style Plus wins on value. The Thetford Aqua-Magic Style Plus costs $133.88 less ($286.11 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.
Thetford Aqua-Magic Style Plus
#12 in RV gravity-flushFull review
A tall ceramic Thetford for buyers who want chair height without paying Dometic prices.
Amazon $286.11$286.11
Which should you buy?
- 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, household-size bowl) and warranty (2-year warranty vs 1-year warranty).
- Choose the Thetford Aqua-Magic Style Plus for value ($286.11, against other toilets in its group vs $419.99, 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 420 Platinum | Thetford Aqua-Magic Style Plus |
|---|---|---|
| Overall rating | 3.4/5 | 3.2/5 |
| Value 25% | 0 $419.99, against other toilets in its group | 33 $286.11, against other toilets in its group |
| Flush water 20% | 50 flush volume not published (neutral score used) | 50 flush volume not published (neutral score used) |
| Power draw 15% | 100 no electrical draw | 100 no electrical draw |
| Features 25% | 100 ceramic or porcelain bowl, soft-close seat, freshwater flush, water-saver flush, household-size bowl | 65 ceramic or porcelain bowl, freshwater flush, household-size bowl |
| Warranty 15% | 25 2-year warranty | 0 1-year warranty |
Specifications
| Dometic 420 Platinum | Thetford Aqua-Magic Style Plus | |
|---|---|---|
| Flushing | ||
| Type | Gravity | Gravity |
| Freshwater flush | Yes | Yes |
| Water-saver flush | Yes | - |
| Macerator | No | No |
| Control | Foot pedal | Single foot pedal |
| Power | ||
| Draw at 12 V | None | None |
| Bowl and fit | ||
| Bowl size | Elongated, standard | High profile |
| Bowl material | Porcelain | China |
| Household size | Yes | Yes |
| Soft-close seat | Yes | No |
| Seat height | 18 in | 17.5 in |
| Rough-in | 7.6 in | - |
| Build | ||
| Warranty | 2 years | 1 year |