Flamco Flexfiller Direct G4 Pumpless Top-Up Pressurisation Unit

Wall mounted pumpless digital pressurisation unit
Quick Code
£2280 £1,198.20 £998.50

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The Flexfiller Direct G4 is the latest in pumpless digital pressurisation technology for light commercial and residential buildings. It’s a slim, wall-mounted pumpless top-up pressurisation unit, with a top-up flow rate of up to 14 l/min depending on the mains or boosted mains, water pressure. It is designed to be connected directly to a building’s incoming water supply using the included flexible hose. It is there to fill and maintain the pressure of a heating or chilled water system without the need for a pump.

The unit comes with a user-friendly controller that displays all operating and error conditions comprehensibly and conveniently. It features extensive data storage for online and offline analysis, microprocessor control, and self-learning algorithms with a graphical display. It comes with MODBUS RTU and BACnet communication

Features & Benefits:

  • Silent, Pumpless pressurisation unit
  • FIlls system from empty
  • For systems up to 15,000 LItres
  • Fluid protection category 4 backflow prevention
  • ONscreen service reminder every 12 months
  • Colours: Grey (RAL7016) and Red (RAL3002)
  • Password protected
  • PRessure setting in 0.1 bar increments
  • FLoor protection runtime limiter and excessive activation logging
  • Volt free contact: common alarm (N/C or N/O) fully programable for specific alarms customisable via control unit)
  • Extensive data storage online or offline analysis
  • Advanced technology ensures the lowest power consumption, Long service life and easy maintenance
  • Microprocessor control, self-learning with graphical display
  • Max flow rate of 14 Ltr/min
  • Connects directly to the mains (booster) water mains, via included flexible hose (Length: 400mm)


  • Universal connection to drain fits 22 mm copper compression, 32mm PP push fit and 32mm PP solvent weld discharge pipe to BS 5254 or BS EN1451
  • The user-friendly control unit displays all operating and error conditions in a logical and convinient way
  • Four status LED indicators
  • System safety valve monitoring
  • Leak detection
  • USage monitor, logs and counters
  • MODBUS RTU and BACnet Communication Protocol via RS485
  • Can be combined with Flamconnect Remote Service (Check with local sales office)
  • Two 40cm flecible hoses (for mains and sealed system connection) included for easy installation
SKU 20100
Brand Flamco
Model Flexfiller Direct G4
Quick Code 016564
Power Supply 240V 1~ 50Hz
Max Flow Rate 14 l/sec
Maximum Working Pressure (bar) 10