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Top User RatedThetford Chemical Toilet Porta Potti Excellence with Manual Pump 21lt
44.8x38.8x45cm
from189,39 € at 6 stores 
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Clear- Small (up to 12L): For short overnight stays, use as a backup toilet, or for children. Suitable for tents or small vans.
- Regular (13 to 21L): For use by 2-3 people for a few days. Suitable for medium-sized caravans, boats, and multi-day camping.
- Large (22L and above): Suitable for large families or extended vacations (5+ days). Ideal for large motorhomes or permanent campsites.
- Bellows Pumps: The simplest and most traditional mechanism. It looks like a small plastic “accordion,” which you press down manually to push the water into the bowl.
- Piston Pumps: The mechanism works like a small manual pump. You pull the piston (handle) up and push it down to send the water forcefully into the bowl.
- Electric Pumps: It operates with standard batteries placed in a special waterproof compartment. All you have to do is press a button.