Flow-Matic Automatic backwash system for sand filters

The Blue Lagoon Flow-Matic is an automatic backwashing system and is designed to fit on all ‘side mounted’ sand filters. It replaces the traditional multiport valve and reduces pressure loss due to its unique water flow design.

Blue Lagoon Flow-Matic with controller

Advantages of the Blue Lagoon Flow-Matic

  • Made in the Netherlands
  • Replaces traditional multiport valves
  • Reduces pressure loss significantly
  • Backwash en rinse duration are programmable
  • Chemical resistant
  • Easy installation and maintenance



The Blue Lagoon Flow-Matic is an automatic backwashing system that fits on all side mounted sand filters. It replaces the traditional multiport valve and will reduce the total pressure loss due to its unique flow design. The Flow-Matic had 4 automatic 3-way valves and a touch screen controller. The controller automatically starts/stops the circulation pump and operates the valves for backwash, rinse and filter positions. The user can decide how often the Flow-Matic performs a backwash. Besides the
automatic backwash function the user can activate an extra backwash at any time by touching the backwash function in the controller. Backwash and rinse duration can be defined by the end user. Manual functions for recirculation and draining to waste are also available in the controller.
Flow-Matic Operation


  • Waste and circulation function
  • Power supply / connection for a UV-C device
  • Automatic UV-C lamp switch off, during backwash process
  • UV-C lamp timer function
  • A low-energy / frequency controlled pump connection (Blue Eco). Adjustable for different capability, filtering and backwashing

Where to buy Blue Lagoon products?

For pool installers we have a global dealernetwork where Blue Lagoon UV-C purifiers and pool supplies can be bought. Can’t find one near you? Please contact us.

Also contact us directly if you have a wholesale enquiry or if you are in need of water purification advice for your pool project.

Blue Lagoon Flow Matic
Item code4050000
Operating elementsLCD touch-screen display
Dimentions unit55 x 45 x 35 cm
Diameter in-outlet63 mm
Supply Voltage230V AC 50/60Hz
Max. power circulation pump2.000 VA
Automatic valves24V
IP certificationIP54
Maximum flow25.000 l/h
Max. pressure1,5 bar
Download manual Flow-Matic (pdf, 3,6 mb).