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Flamco Flexfiller Direct G4 - Compact, Pumpless Top-Up Pressurisation Unit

Special Price £1,258.80 £1,049.00 Regular Price £2,359.80 £1,966.50

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1 Year Warranty
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Flamco Flexfiller Direct G4 - Compact, Pumpless Top-Up Pressurisation Unit

The Flexfiller Direct G4 represents the latest advancement 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 water pressure on the mains or boosted mains.


The included flexible hose is designed to be connected directly to a building's incoming water supply. Its purpose is to fill and maintain the pressure of a heating or chilled water system in the absence of a pump. The unit includes a user-friendly controller that clearly and conveniently displays all operating and error conditions. It has a graphical display and extensive data storage for online and offline analysis. It also has microprocessor control and self-learning algorithms. It includes the MODBUS RTU and BACnet communication protocols as standard, as well as password-protected key operating parameters.


Product features

  • Silent, pumpless pressurisation unit.
  • Fills system from empty.
  • For system volumes up to 50,000 litres.
  • Fluid Protection Category 4 backflow prevention.
  • Onscreen service reminder (12 months).
  • Colours: Grey (RAL7016) and Red (RAL3002).
  • Password protected.
  • Pressure setting in 0.1 bar increments.
  • Flood protection (Runtime limiter and excessive activation logging).
  • Volt free contact: Common alarm (N/C or N/O), fully programmable for specific alarms customisable via control unit).
  • Extensive data storage for 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 l/min.
  • Connects directly to the mains (boosted) water mains, via included flexible hose (L = 400 mm).
  • Universal connection to drain fits 22 mm copper compression, 32 mm PP push fit and 32 mm PP solvent weld discharge pipe to BS 5254 or BS EN1451.
  • The user-friendly control unit displays all operating and error conditions in an logical and convenient way.
  • Four status LED indicators.System safety valve monitoring.
  • Expansion vessel health monitoring.Leak detection.
  • Usage monitor, logs and counters.
  • MODBUS RTU and BACnet Communication Protocol via RS485.
  • Can be combined with Flamconnect Remote (Please check availability).
  • Two 40 cm flexible hoses (for mains and sealed system connection) included for easy installation.
More Information
Delivery Estimate In stock
KIWA Approval Yes
Product Type Pressurisation Units
Custom Shipping 0.000000
Manufacturer Flamco UK
Model Range Flexfiller Direct
Warranty 1 Year Warranty
Dimensions 225 x 141 x 359mm (WxDxH)
Power Supply 220V-240V Single Phase
Kw Rating Standby: 2W - Filling: 19.4 W
Product Code 20100
Tank Insulation Not insulated
Outlet Connection 15mm compression
Inlet Connection 15mm compression
Positioning Wall mounted
System Type Heating