4-Stage USA Made Quantum Disinfection Reverse Osmosis Filter Pack | FP4S-USA

Regular Price $99.92 On Sale $59.95
In Stock

Exactly like our regular 4-Stage Filter Pack with the addition of the Quantum Disinfection Cartridge as the final polishing filter. IT KILLS BACTERIA! Turns any RO system into a purifier.

4-Stage Made in USA Filter Pack With Quantum Disinfection Cartridge Turns Any RO System into a Purifier!

Our 4-Stage Filter Pack includes silicone to lubricate the O-Rings and the Quantum Disinfection Cartridge so that you can trust your water to be as clean as it can be.

Fits Most Sump-Type Filters Using 2-1/2" x 9.75" (10") Housings, Including the Following Models:

  • Watts FMRO4G
  • Watts FMRO4J
  • All Flowmatic 4-Stage Systems
  • Goldline
  • Valueline
  • US Water 4-Stage
  • Aquapurion
  • WaterLogix
  • Most other 4-Stage Models

All Filters are Made in the U.S.A.


  • (1) 5 Micron Pre-Filter
  • (1) Carbon Block Pre-Filter
  • (1) 1/4" NPT In-Line GAC Post-Filter with Quantum Disinfection Cartridge
  • (1) Silicone Packet
  • (1) RO Sanitizing Packet
  • (1) Syringe
  • Detailed Instructions
  • On-Line Video

It is recommended that filters be changed at 12 month intervals, depending upon water quality.

additional information

American MadeYes
Filter Size2.5 x 10
Filter TypeReverse Osmosis Filter Packs
Micron Rating5 Micron
ManufacturerUS Water Systems