4-Stage, 50 GPD Reverse Osmosis Replacement Cartridge Kit with Pentair Membrane


In Stock as of 6:00pm EST


ROK-4M-50BET includes the following standard size replacement cartridges for a 4-Stage, 50 GPD Reverse Osmosis System like the one shown below. All cartridges in this kit are NSF Certified.

Pentair is the largest brand in the water industry with rejection rates that are close to Filmtec.

4-Stage Reverse Osmosis System

4-Stage Reverse Osmosis System

Additional information

Gallons Per Day


Parts / Accessories

  • CA Ware 10″ x 2-1/2″, 1, 5 or 10 Micron Carbon Block Filter Cartridge – 10 Micron

    Part#: CBC10-10
  • AICRO Inline GAC Filter/RO Post Filter

    Part#: AICRO-NSF
    Top Seller
  • Pentair 50 GPD Thin Layer Composite Reverse Osmosis Membrane

    Part#: TLC-50
    Top Seller