Truma Ultraflow Waterline is a 15 metre 'food quality' hose pipe to connect the Ultraflow water system directly to a mains water supply. Complete with fittings and a special pressure reducing valve.  No additional installation required. Truma Ultraflow Waterline is a simple turn on – turn off system giving a constant water supply.  Compatible with the Ultraflow filter and Ultraflow compact water systems, simply by being plugged into the Ultraflow housing.