Thetford vs Dometic Toilets
Thetford: £100-130, cassette system, reliable. Dometic: £100-150, premium, better sealing.
Both are excellent. Thetford is slightly more UK-available.
Capacity Comparison
Thetford C400: 7L waste tank, 1.3L water seal Dometic 973: 7L waste tank, 1.3L water seal
Both have identical capacity. The difference is in seal design and ease of emptying.
Odour Control
Thetford: Aqua-King enzyme system Dometic: Aqua-Air pump system
Thetford's enzyme-based system generally provides better odour neutralisation. However, both systems are effective when maintained regularly.
Price
Thetford C400: £150-200 Dometic 973: £180-230
Thetford offers better value while maintaining comparable quality.
Availability in UK
Thetford: Widely available (Amazon UK, Europarts) Dometic: Available through specialist dealers
Thetford's wider availability means better value and easier parts replacement.
Thetford Qube 3 (Compact Cassette Toilet)
The Thetford Qube 3 is the most popular cassette toilet for UK campervans, starting at £160-200. It's designed specifically for smaller vans — the compact footprint (38 x 33 x 37cm) fits through most van door openings, which is critical for rear-loading vans like the Ford Transit Custom or Mercedes Vito.
Key specs:
- Weight: 4.5kg empty
- Fresh water capacity: 7L
- Waste holding capacity: 21L
- Seat height: 36cm
- Mounting options: Floor or wall
- Odour seal: Dual-position swing gate
Pros:
- Compact design — perfect for small vans, the best-selling option in the UK for a reason
- Lightweight — 4.5kg is easy to handle when emptying
- Proven reliability — Thetford has been making van toilets for 50+ years
- Easy emptying — telescopic handle extends to 1m for wheelie bin compatibility
- Good UK availability — available at Halfords, Amazon UK, CamperKing
Cons:
- Small waste tank — 21L means emptying every 3-5 days for one person
- Basic seat — no cushioning, hard plastic
- Manual pump — no electric flush option at this price point
Dometic Swingo Compact
The Dometic Swingo starts at £180-230 and is the premium alternative to Thetford. The Swingo's unique selling point is the pivot mechanism — the toilet seat rotates 90° so you can face sideways in a van, saving significant floor space.
Key specs:
- Weight: 4.7kg empty
- Fresh water capacity: 7L
- Waste holding capacity: 21L
- Seat height: 38cm
- Mounting options: Floor only (no wall mount)
- Odour seal: Premium blade valve
Pros:
- Swivel mechanism — saves space, great for narrow vans
- Premium build quality — slightly better plastic than Thetford
- Ergonomic seat — more comfortable for longer stays
- Better blade valve — slightly more effective odour seal
Cons:
- More expensive — 15-20% more than Thetford Qube
- Floor mount only — wall mounting is possible but requires custom bracket
- Heavier — 4.7kg vs 4.5kg (negligible difference)
- Pivot mechanism complexity — more parts that can fail
Side-by-Side Comparison
| Feature | Thetford Qube 3 | Dometic Swingo |
|---|---|---|
| Price | £160-200 | £180-230 |
| Weight | 4.5kg | 4.7kg |
| Waste Tank | 21L | 21L |
| Fresh Water | 7L | 7L |
| Seat Height | 36cm | 38cm |
| Space-saving | Standard footprint | Swivel (saves 30% floor) |
| Mounting | Floor + Wall | Floor only |
| Odour seal | Good | Excellent |
| Best for | Budget builds | Space-constrained vans |
Real-World UK Van Life Experience
Thetford Qube 3: Had no issues over 6 months. The 21L tank lasted about 4 days for 2 people. Emptying at a caravan site costs £3-5 per empty. The swing gate seal is effective — no odours when parked.
Dometic Swingo: The swivel mechanism is genuinely useful in narrow vans. In a VW Transporter with just 1.2m floor space, the ability to turn the toilet sideways saved us from bumping our knees every morning. The blade valve is slightly quieter when opening.
Which Should You Buy?
Get the Thetford Qube 3 if: You want the best value, have standard van dimensions, and don't need the swivel. It's the best-selling option for a reason.
Get the Dometic Swingo if: You're in a very narrow van (under 1.2m internal width) and the swivel mechanism will genuinely save space. The extra £20-50 is worth it if floor space is your constraint.
FAQ
How often do you need to empty a cassette toilet? With a 21L tank, expect every 3-5 days for 1-2 people. At UK caravan sites, expect £3-5 per empty. Some sites have free waste disposal points.
Can you pee directly into the cassette? Yes — the Thetford Qube 3 has a "pee directly" feature where a gate drops into the waste tank, avoiding the need to add fluid.
Do you need to add chemicals? Not essential. A small amount of Thetford Aqua-Magic or Dometic Quick-Drop tablets helps with odour control but isn't required for function.
