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GE Osmonics TFM-18 RO Membrane

GE Desal TFM-18 Reverse Osmosis Membrane 1220188 Osmonics, GE-RO-TFM-18
Brand: GE Osmonics Desal
Price: $33.95
List Price: $33.95
On Sale For: $26.99
Dimensions: 11 7/8" x 1.8"
Weight: 1 lb

In stock


GE Osmonics Pentair TFM-18 RO Membrane is a 12" x 2" replacement cartridge providing 18 gallons per day of pure water and can fit RO systems that use standard Thin Film Composite Membranes (TFM/TFC) with capacities between 18 and 150 gallons per day. This Pentek GE Osmonics RO membrane reduces lead, mercury, chromium, nitrates and many other pollutants and contaminants. Primarily a residential class RO filter, the TFM-18 membrane can also handle commercial applications in restaurants, vending machines, pharmaceuticals, laboratories and electronics.

Pentair TFM-18 is manufactured with "Membrane-Separation Technology" which employs cross-flow filtration where captured impurities on the membrane are constantly swept away by the concentrate stream. Cross flow filtration across the membrane then divides the flow into two outflow streams: the cleansed permeate feed and the concentrate or reject stream. This flow provides continuous cleaning that prolongs membrane life and reducing maintenance costs.

Membrane elements by GE are the brand of choice for most demanding applications. GE drinking water filters reduce many pollutants and contaminants with a premium membrane process that removes particles 100,000 smaller than human hair. The elements deliver outstanding performance and long-lasting operation.

Key Features & Benefits:

  • 18 gallons per day capacity.
  • Thin Film Composite Membrane for efficient purification.
  • Cross compatible with other RO filter brands.
  • Extended filter life.
  • ANSI/NSF 58 listed for performance requirements.


Manufacturer ID:1120188
Dimensions(inch/es):12 inch L x 2 inch D (Actual 11.75 inch x 1.79 inch)
Primary Filter Media:Semi-Permeable Membrane(TFM/TFC)
Salt Rejection(%):98 %
Flow Rate (Gallons per Day, gpd):18 gpd *
Operating Pressure(psi):65 psi - 100 psi (4.48 bar - 6.90 bar)*
Operating Temperature(°F):77°F - 120°F (25°C - 49°C)
Filter Life(months):24-36 months **
pH Range:4 - 11
Free Chlorine (ppm):0.1 ppm
Core:TFC (Thin Film Composite)
Outer Wrap:Tape
*Nominal performances are based on a 500 ppm softened tap at 65 psig (4.48 bar), 77°F (25°C), 15% recovery after 24 hours. Individual element flux may vary ± 15.
** Filters and membrane elements are not to be installed on micro-biologically unsafe water supplies. Membrane Elements by GE are not certified to sanitize water, remove cysts, bacteria, or viruses. Filter and membrane element performance can be affected by fluctuations in water quality.

Fits following Brands: PENTEK, U.S. Water ( US Water ), Culligan, Ametek, US Filter, American Plumber, Kinetico, Watts, EcoWater ERO-300, GE GXRV-10 (GXRV10) and many more. Also, should replace Fastek TLC-18 (make sure your Fastek membrane has nipple at the top AND bottom, it will not work if you have a flat-bottom membrane).

A good made in USA upgrade for this membrane will be Filmtec TW30-1812-24 24 GPD membrane.

- The GE Desal TFM-18RO Membrane is not chlorine resistant. A chlorine taste and odor reduction water filter must be used before the RO membrane if chlorine is present in your water supply.
- The DESAL-TFM-18 does not reduce fluoride.
- This TFM Membrane Element is Tested and Certified by NSF International against NSF/ANSI Standard 58 for performance requirements only.
- Manufactured by Pentair.

Tested and Certified

NSF ComponentNSF 58

GE Residential Membranes manual (pdf) 0.13 MB

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