SFA Saniflo Sanimarin 31
#15 in Electric marineFull review
The most water-frugal head here, in a compact low-profile design for small boats and campervans.
Amazon $828.75$828.75
The SFA Saniflo Sanimarin 31 is the better boat or RV toilet overall, rated 2.7 to 2.5. The SFA Saniflo Sanimarin 31 leads on flush water. The SFA Saniflo Sanimarin 4 wins on features. The SFA Saniflo Sanimarin 31 costs $68 less ($828.75 vs $896.75).
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.
SFA Saniflo Sanimarin 4
#17 in Electric marineFull review
A comfortable standard-height macerating head that publishes both its flush volumes. Suits owners who care about water and noise.
Amazon $896.75$896.75
Which should you buy?
- Choose the SFA Saniflo Sanimarin 31 for flush water (0.3 gal (1.2 L) per flush vs 0.6 gal (2.4 L) per flush).
- Choose the SFA Saniflo Sanimarin 4 for features (soft-close seat, water-saver flush, household-size bowl vs soft-close seat, water-saver flush).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every electric marine boat or RV toilet; a clear win is highlighted. How we rank explains each one.
| Factor weight | SFA Saniflo Sanimarin 31 | SFA Saniflo Sanimarin 4 |
|---|---|---|
| Overall rating | 2.7/5 | 2.5/5 |
| Value 25% | 16 $828.75, against other toilets in its group | 9 $896.75, against other toilets in its group |
| Flush water 20% | 71 0.3 gal (1.2 L) per flush | 29 0.6 gal (2.4 L) per flush |
| Power draw 15% | 50 amp draw not published (neutral score used) | 50 amp draw not published (neutral score used) |
| Features 25% | 35 soft-close seat, water-saver flush | 55 soft-close seat, water-saver flush, household-size bowl |
| Warranty 15% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| SFA Saniflo Sanimarin 31 | SFA Saniflo Sanimarin 4 | |
|---|---|---|
| Flushing | ||
| Type | Electric | Electric |
| Water per flush | 0.3 gal | 0.6 gal |
| Water-saver flush | Yes | Yes |
| Macerator | Yes | Yes |
| Control | Control panel | Control panel |
| Power | ||
| Voltage | 12 V | 12 V |
| Bowl and fit | ||
| Bowl size | Low profile | Standard height |
| Household size | - | Yes |
| Soft-close seat | Yes | Yes |