If you own a campervan, then you know that even the smallest missing part can turn into a big headache. And when it comes to your Thetford cassette toilet, losing the pour cap can create a messy situation—literally!
The Problem: A Missing Cap That’s Hard to Replace
When dumping the cassette toilet, the last thing on your mind is a small twist on cap and even if it was sometimes, it can just get misplaced or destroyed and need to be replaced.
Here’s the frustrating part: finding an exact replacement from the manufacturer can be surprisingly difficult. Trying to find the exact blue replacement cap is pretty tough and if you do find it, the price is kind of ridiculous.
A Perfect-Fit Alternative
Thetford offers the replacement cap in yellow and it fits a few different series including the Thetford C series 20097706.
While this replacement cap might come in a different color than your original, it fits perfectly and does the job exactly as it should.

Pro Tips for Van Life Maintenance
While we’re on the topic of cassette toilets, here are a few quick maintenance tips to keep your system running smoothly:
- Check your caps regularly during your weekly maintenance routine
- Keep a spare cap on hand for emergencies
- Inspect for wear on rubber seals and gaskets periodically
This replacement cap is a perfect example of how a small fix can make a big difference in your travel experience.

