How to Upgrade from a Truma Crystal System to an Ultraflow System
Upgrading from a Truma Crystal System to an Ultraflow System
If your caravan is fitted with an older Truma Crystal water system, you may have noticed that replacement parts are getting harder to find. The good news is, you don’t need to replace your whole setup — the Truma Ultraflow Conversion Kit (46010-03) lets you upgrade your existing system easily while keeping your original pump assembly.
Why Upgrade to Ultraflow?
The Ultraflow system is Truma’s modern water connection design. It offers a more secure, watertight connection and better filtration compared to the older Crystal system. It’s also compatible with Truma’s current range of accessories and spares, making it a longer-term solution for maintenance and reliability.
Upgrading helps avoid leaks and connection issues that can develop with older fittings, especially if your original housing has become brittle or discoloured over time.
What’s Included in the Kit
Each kit comes with:
- Ultraflow housing
- Pistol grip pump connector
- Filter unit
Template size: 108 mm × 163 mm
Truma part number: 46010-03
The components are designed to fit neatly in place of your old Crystal MK2 housing, making the conversion straightforward for most caravans.
Fitting the Conversion Kit
Installation is simple for anyone with basic DIY knowledge. Remove the old Crystal housing, cut or clean the panel opening if required, and fit the new Ultraflow housing in its place. The existing pump connects to the new pistol grip connector, allowing you to continue using it without modification.
For best results, always check the fit and seal before reconnecting your water supply.
Reliable Replacement, Modern Performance
This conversion kit offers a practical way to keep your caravan’s water system working efficiently without replacing everything. It’s a genuine Truma part, designed to meet current standards for performance and durability making it ideal for long-term touring use.
If you’re not sure whether the Ultraflow Conversion Kit fits your setup, feel free to contact Thomas Touring for advice, we’re always happy to help you find the right parts for your caravan or motorhome.