Check the listing for details. Environ Pump Assembly for Heater With Circulation Grundfos High Efficiency. Color: Black, Width: 250 mm, Condition: New, Made in Germany. Listed at 460.80 USD. The ProfiMix EN001 pump group is a ready-to-install, professional pump group for heating circuits such as underfloor heating, wall heating, radiators, etc. with built-in three-way brass mixer and an Environ END05 servomotor. A Grundfos UPM3 Hybrid 25/7, 180mm high-efficiency pump (BAFA eligible) is installed. Forward and reverse can easily be reversed from right to left. In the upper area of the pump group there are flat-sealing shut-off valves (1" IT) with built-in thermometers (0-160°C) and integrated gravity brake in the flow. If the pump group is installed individually, a wall bracket can be screwed to the shut-off valves (not included in delivery). Maintaining or replacing the circulation pump is very easy without having to drain the system.