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
The Biolan Simplett Plus and the Thinktank Waterless Toilet are evenly matched, rated 3.1 and 3.1. The Biolan Simplett Plus leads on capacity. The Thinktank Waterless Toilet wins on warranty. The Biolan Simplett Plus costs $80 less ($1,099 vs $1,179).
Thinktank Waterless Toilet
#20 in Urine-divertingFull review
A household style diverting toilet for cabins and tiny homes with a urine drain, the one to pick if guests need to stand to pee.
Amazon $1,179$1,179
Prices were last checked October 31, 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 Biolan Simplett Plus for capacity (solids capacity not published, urine can drain vs about 50 uses per solids bin, urine can drain).
- Choose the Thinktank Waterless Toilet for warranty (6-year warranty vs 1-year warranty).
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 | Biolan Simplett Plus | Thinktank Waterless Toilet |
|---|---|---|
| Overall rating | 3.1/5 | 3.1/5 |
| Value 30% | 24 $1,099 | 17 $1,179 |
| Capacity 25% | 65 solids capacity not published, urine can drain | 39 about 50 uses per solids bin, urine can drain |
| Power 15% | 100 needs no power | 50 power draw not published (neutral score used) |
| Certification 15% | 50 NSF/ANSI 41 certification not stated (neutral score used) | 50 NSF/ANSI 41 certification not stated (neutral score used) |
| Warranty 15% | 0 1-year warranty | 100 6-year warranty |
Specifications
| Biolan Simplett Plus | Thinktank Waterless Toilet | |
|---|---|---|
| Capacity | ||
| Type | Urine-diverting | Urine-diverting |
| Uses per solids bin | - | 50 uses |
| Urine drain option | Yes | Yes |
| Agitator | No | No |
| Power and venting | ||
| Power | None needed | 12V/120V |
| Vent size | 3 in | 3 in |
| Build | ||
| Seat height | 18.3 in | 19 in |
| Dimensions | 20.9 x 26.8 x 40.2 in | 18 x 23.2 x 19 in |
| Weight | 22 lb | 30 lb |
| Material | - | Rotationally molded plastic |
| Warranty | 1 year | 6 years |