4-Stage USA Made Standard Reverse Osmosis Filter Pack | FP4-USA

Regular Price $58.25 On Sale $34.95
In Stock

There are lots of filter companies selling Reverse Osmosis filters, but if you look closely, you'll find that nearly all of them are made in Taiwan or China. While it is not always possible to sell everything that is American-Made, this 4-Stage Reverse Osmosis Filter Pack is entirely made in the USA using OMNIPURE and Purity Plus NSF Certified Filters. Not only are they made in the USA, they're the best in the industry. Hands Down! You can trust your water to US Water.

Our 4-Stage Filter Pack includes silicone to lubricate the O-Rings and RO Sanitizing Solution, so that you can trust you 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
  • US Water 4-Stage
  • WaterLogix
  • Most other 4-Stage Models

All Filters are NSF Certified for High Purity Reverse Osmosis Systems and are Made in the U.S.A.


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

It is recommended that filters be changed at 6 or 12 month intervals, depending upon water quality. You can add a Membrane to your filter pack at a substantial savings by choosing the membrane above.

additional information

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