The Vaillant Protection Kit is specially designed for Vaillant boilers. The kit includes a high-quality Vaillant metal water filter and a system test kit. The magnetic field booster technology results in fast, optimal dirt separation. Everything you need to maintain an efficient system. Vaillant's unique magnetic field booster technology guarantees unprecedented fast, optimal dirt separation. Keeping your system operating to its maximum efficiency, which therefore protecting against costly components. Even the smallest magnetite particles are removed, maximising system performance as well as protecting costly system components. The design allows the collected dirt to be removed quickly and easily.