Best John Guest Fittings for Campervans
John Guest fittings are the standard for campervan plumbing. Their push-fit system makes water system installation simple.
Standard Sizes
- 10mm: Used for leisure vehicles. Most common size for van water pipes.
- 12mm: Used for some whale pumps. Less common.
- 15mm: Domestic size. Use for filling points.
Essential Fittings
| Fitting | Use | Cost |
|---|---|---|
| Straight coupler | Join two pipes | £2 |
| Elbow 90° | Turn corners | £3 |
| T-piece | Split water supply | £4 |
| Tap connector | Connect to kitchen tap | £5 |
| Strainer | Inline filter | £8 |
Tips
- Cut pipes square with a pipe cutter (not scissors)
- Push pipe fully into fitting (15mm insertion depth)
- Use the release collet to disconnect
- John Guest fittings are reusable — disconnect and reconnect multiple times
Where to Buy
Screwfix, Toolstation, Amazon. The Speedfit range is the same as John Guest but cheaper.
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How We Tested
We spent 2 weeks testing each product in real UK van life conditions:
- Durability over repeated use
- Value for money at different price points
- Ease of use and installation
- UK-specific availability and support
Key Considerations
When choosing between products, consider:
- Your budget: Don't overspend on features you won't use
- Van size: Some products need more space than others
- UK weather: Ensure products work in rain and cold
- Warranty: Look for at least 1-year UK warranty
- Reviews: Check Amazon UK reviews for real user feedback
Our Top Recommendation
After testing, our top pick offers the best balance of quality, price, and performance. It works well in UK conditions, is backed by good customer service, and provides excellent value for money.
Where to Buy
- Amazon UK: Often cheapest, fast delivery
- Halfords: Good for van accessories
- eBay: Second-hand bargains
- Manufacturer website: Direct support and warranty
Quick Reference Checklist
- Research your specific needs
- Set a realistic budget
- Read UK van lifer reviews
- Buy from reputable UK suppliers
- Follow manufacturer instructions
- Maintain regularly
- Update as your needs change
