The Pleno PI 6 water make-up system is a pressure monitoring and filling device that ensures that the correct water reserve is provided for the expansion vessel. It is suitable for heating, solar and chilled water systems.

Unlike the Pleno PI system, the PI 6 has one or two pumps. It is pressure-dependant for expansion vessels, and level-dependent for pressure maintenance systems. Up to 50% antifreeze can be added.

The water make-up system has a BrainCube control unit for intelligent and safe system operation. The PI 6 can be combined with a TecBox control unit and pressurisation vessels to create a complete pressure system.

It is made in Switzerland by Pneumatex and is CE marked