The Herz PUMPFIX Constant DN25 PN10 pump group, identified by part number PJ99F2, is a genuine Herz component designed for efficient integration into heating and cooling systems. This pre-assembled and leak-tested unit features DN25 nominal diameter and PN10 nominal pressure, ensuring robust performance. It includes essential components such as a high-efficiency pump, two ball valves with integrated thermometers (0-120 °C), a check valve, flow sensor, pressure gauge, safety valve, expansion vessel connection, filling/draining valve, air vent, and dirt trap. The unit is fully insulated for optimal thermal performance and is suitable for systems with a maximum operating pressure of 10 bar and a maximum operating temperature of 110 °C. It connects via 1 1/2 inch union nuts on the pump side and 1 inch internal thread on the system side.