PSJ filter systems

Outstanding pre-filter systems for all applications

The PSJ Prefilter Systems from BWT are designed to filter water prior to reverse osmosis systems or as a stand alone filter system. PSJ Systems utilize high capacity jumbo filter housings in 1 high 10” and 2 high 20” sizes. Inlet and outlet connections are 3/4” bspm for easy connection to existing pipework or braided SS hoses. Twin systems are also available for extra high capacity applications.
Housings feature a vent valve, to assist in air bleeding and a downstream pressure gauge to measure water pressure and filter life (when on-demand). The high capacity Fibron® dual-purpose filter cartridge is provided with every system. The Fibron® filter cartridge reduces sediment, chlorine, taste & odour from the mains water giving protection to the ultra-fine reverse osmosis membranes.

A mounting bracket and handy housing sump spanner are also included with the PSJ system.


  • Micron Rating: 5 micron nominal
  • Flow rate: < 30 lpm
  • Water Pressure range: 100 – 860 kPa ( if > 86o kPa use pressure limiting valve )
  • Temperature range: 5 – 40 degrees C ( protect from UV and freezing )
  • Capacity: change out every 12 months or when outlet pressure gauge reads < 50 kPa when on demand

Product Details / Guide

CodeDescriptionDimensions H x W (mm)
PSJ1001 high single system c/w FB5W480 x 220
PSJ2002 high single system c/w FB5W20720 x 220
PSJ300Twin system 1 high PS5W + FB5W480 x 420
PSJ400Twin 2 high system c/w PS5W20 + FB5W20720 x 420
FB5WFibron Carbon Block filter 5 micron 1 high250 x 115
PS5WPolyspun Sediment filter cartridge 5 micron 1 high250 x 115
FB5W20Fibron Carbon Block filter 5 micron 2 high505 x 115
PS5W20Polyspun Sediment filter cartridge 5 micron 2 high505 x 115