Dometic 300 Series Standard Height
A light plastic Dometic that sips water, good for dry camping.
Amazon $225$225
The Dometic 300 Series Standard Height rates 3.7 among RV gravity-flush boat or RV toilets; the Jabsco Twist n Lock 29090 Compact rates 3.1 among manual marine ones. The Jabsco Twist n Lock 29090 Compact costs $11.51 less ($213.49 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.
Jabsco Twist n Lock 29090 Compact
#3 in Manual marineFull review
A compact hand-pumped head that fits small sailboat and powerboat compartments. Choose it when you want no wiring and no battery draw.
Amazon $213.49$213.49
Scores side by side
These two sit in different type classes (RV gravity-flush and manual marine), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Dometic 300 Series Standard Height | Jabsco Twist n Lock 29090 Compact |
|---|---|---|
| Overall rating | 3.7/5 | 3.1/5 |
| Value 25% | 53 $225, against other toilets in its group | 60 $213.49, 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% | 55 freshwater flush, water-saver flush, household-size bowl | 20 freshwater flush |
| Warranty 15% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Dometic 300 Series Standard Height | Jabsco Twist n Lock 29090 Compact | |
|---|---|---|
| Flushing | ||
| Type | Gravity | Manual |
| Water per flush | 0.1 gal | - |
| Freshwater flush | Yes | Yes |
| Water-saver flush | Yes | - |
| Macerator | No | No |
| Control | Gravity flush | - |
| Power | ||
| Draw at 12 V | None | None |
| Bowl and fit | ||
| Bowl size | Standard height | Compact |
| Bowl material | Plastic | - |
| Household size | Yes | - |
| Soft-close seat | No | - |
| Inlet hose | 1/2 in NPT | - |