Dometic 420 Platinum vs Thetford Aqua-Magic Style II High

Last updated: November 9, 2026

The Thetford Aqua-Magic Style II High is the better boat or RV toilet overall, rated 3.6 to 3.4. The Thetford Aqua-Magic Style II High leads on value. The Dometic 420 Platinum wins on features and warranty. The Thetford Aqua-Magic Style II High costs $214.97 less ($205.02 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 vs Thetford Aqua-Magic Style II High

Which should you buy?

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 weightThetford Aqua-Magic Style II HighDometic 420 Platinum
Overall rating3.6/53.4/5
Value 25%61 $205.02, against other toilets in its group0 $419.99, 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 draw100 no electrical draw
Features 25%80 ceramic or porcelain bowl, freshwater flush, water-saver flush, household-size bowl100 ceramic or porcelain bowl, soft-close seat, freshwater flush, water-saver flush, household-size bowl
Warranty 15%0 1-year warranty25 2-year warranty

Specifications

Thetford Aqua-Magic Style II HighDometic 420 Platinum
Flushing
TypeGravityGravity
Freshwater flushYesYes
Water-saver flushYesYes
MaceratorNoNo
ControlFoot pedal (dual action)Foot pedal
Power
Draw at 12 VNoneNone
Bowl and fit
Bowl sizeHigh profileElongated, standard
Bowl materialChinaPorcelain
Household sizeYesYes
Soft-close seatNoYes
Seat height-18 in
Rough-in-7.6 in
Build
Warranty1 year2 years

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