DAB Active Driver Plus M/M 1.1

The DAB Active Driver Plus M/M 1.1 is a control system that ensures your pump switches on and off automatically depending on water requirement. When an outlet point is opened (e.g. a tap), the system ensures that the pump switches on automatically to provide you with water immediately, then off when the outlet point is closed again. * Inlet size: 1 ¼"  male thread * Outlet size: 1 ½" female thread Why does the DAB Active Driver Plus cost more than a DAB Control-D (Presscontrol), or the Electronic Control System? The difference in price is due to the fact that the system has a different mechanism.  Whereas the DAB Control-D and the Electronic Control System ensure that the pump switches on and off automatically depending on water requirement, the DAB Active Driver Plus takes things a step further. The system also controls the pump's RPM, which is called a speed controller. Why would I opt for a speed controller like the DAB Active Driver Plus? * High energy efficiency: The DAB Active