Hydraulically operated, float controlled valve that controls reservoir filling and reservoir level. Reservoir filling is accomplished in response to hydraulically controlled modulating horizontal float that maintains a constant water level, regardless of fluctuating demand. The BERMAD 1000 is at the leading edge of control valve design, providing a valve that is free of the typical limitations associated with standard control valves. A unitized flexible diaphragm & guided plug provide a significantly ‘look through’ passage resulting in accurate & stable regulation and high flow capacity. The 1000 unique composite structure allows fast & simple maintenance by easy replacing of lightweight diaphragm assembly. It has a wide range of end connection types and sizes, including articulated flange connections isolating the valve from pipeline bending & pressure stresses.