Pump groups DN20

Compact FlowBox DN20 pump groups for radiator heating systems (HK20, HK20-KH) and pump-mixer groups for underfloor heating systems (HKM20, HKF20, HKFC20).

  • Compact design (DN20), footprint approx. DIN A4
  • Quick wall mounting with just one screw
  • Gravity check valve to prevent unwanted circulation
  • 3-part EPP insulation concept, compliant with the German Building Energy Act (GEG), for reduced heat loss
  • Cable routing selectable on the left or right – for easy and safe installation
  • Supply and return lines can be swapped thanks to the flexible mixing valve
  • All connections with G1" external thread, flat sealing
  • Pump length: 130 mm

VB20 boiler manifolds enable the connection of 2 or 3 pump groups. Suitable hydraulic separators can be found here: Hydraulic separators