Nature's Head Composting Toilet
#12 in Urine-divertingFull review
The default pick for vans, boats and cabins: a proven urine-diverting toilet with a crank, a tiny fan draw and a five year warranty.
Amazon $1,035$1,035
The Nature's Head Composting Toilet is the better toilet overall, rated 3.5 to 3.1. The Nature's Head Composting Toilet leads on warranty. The Biolan Simplett Plus wins on capacity. The Nature's Head Composting Toilet costs $64 less ($1,035 vs $1,099).
Biolan Simplett Plus
#19 in Urine-divertingFull review
For seasonal cabins and garden outbuildings without power: a large capacity, unpowered separating toilet that empties into a composter.
Amazon $1,099$1,099
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Nature's Head Composting Toilet for warranty (5-year warranty vs 1-year warranty).
- Choose the Biolan Simplett Plus for capacity (solids capacity not published, urine can drain vs about 60 uses per solids bin, 2.2 gal urine bottle).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every urine-diverting toilet; a clear win is highlighted. How we rank explains each one.
| Factor weight | Nature's Head Composting Toilet | Biolan Simplett Plus |
|---|---|---|
| Overall rating | 3.5/5 | 3.1/5 |
| Value 30% | 29 $1,035 | 24 $1,099 |
| Capacity 25% | 43 about 60 uses per solids bin, 2.2 gal urine bottle | 65 solids capacity not published, urine can drain |
| Power 15% | 100 0.8 W fan | 100 needs no power |
| Certification 15% | 50 NSF/ANSI 41 certification not stated (neutral score used) | 50 NSF/ANSI 41 certification not stated (neutral score used) |
| Warranty 15% | 100 5-year warranty | 0 1-year warranty |
Specifications
| Nature's Head Composting Toilet | Biolan Simplett Plus | |
|---|---|---|
| Capacity | ||
| Type | Urine-diverting | Urine-diverting |
| Uses per solids bin | 60 uses | - |
| Urine bottle | 2.2 gal | - |
| Urine drain option | No | Yes |
| Agitator | Yes | No |
| Power and venting | ||
| Power | 12V | None needed |
| Fan | 0.8 W | - |
| Vent size | 1.5 in | 3 in |
| Build | ||
| Seat height | - | 18.3 in |
| Dimensions | 19 x 19 x 21 in | 20.9 x 26.8 x 40.2 in |
| Weight | 23 lb | 22 lb |
| Warranty | 5 years | 1 year |