100 GPD | High Rejection | 1.8 x 12 | DOW FilmTec RO Membrane

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Brand DOW Filmtec
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Note that DuPont has acquired DOW FilmTec with significant cost increases. We continue to offer DuPont elements but we also recommend AMI Membranes as the preferred alternative. AMI Membranes are Made-In-USA with a large inventory in stock for immediate shipment & are competitively priced.

DOW FilmTec Membrane Elements

DOW FILMTEC™  TW30-1812-100HR High Rejection Home RO Membrane Element

DOW FILMTEC TW30-1812-100HR Elements for home drinking water treatment units produce 100 GPD (16 L/h) of permeate with 98% stabilized salt rejection at standard test conditions. They are shipped dry for convenient handling and long shelf-life. Dow’s next generation elements are a fully compatible replacement for existing DOW FILMTEC residential RO elements. DOW FILMTEC 

DOW FILMTEC TW30-1812-100HR Elements is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.

Replaces FILMTEC part number TW30-1812-100.

Product Specifications


FilmTec Membranes are FDA Compliant    Genuine DOW FilmTec Membrane Element   DOW FilmTec Home RO Membranes are Made in USA


Specifications for TW30-1812-100HR

FilmTec Part Number:
Replaces TW30-1812-100
Size (Approximate): 1.8" Dia. x 12"L*
Flow Rate: 100 gpd  (16 lph)
Applied Pressure: 50 psig (3.4 bar)
Minimum Salt Rejection: 96%
Stabilized Salt Rejection: 98%
Membrane Type:
Polyamide Thin-Film

Permeate flow and salt rejection based:  250ppm softened tap water, 77°F, 15% recovery, 50 psig.

Operating Limits for TW30-1812-100HR

Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 300 psig (10 bar)
Maximum Feed Flow Rate: 2.0 gpm (7.6 lpm)
pH Range, Continuous Operation*: 2-11
Maximum Feed Silt Density Index: 5
Fere Clorine Tolerance**: <0.1ppm

*Maximum temperature for continuous operation above pH 10 is 95°F
**Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, Dow recommends removing residual free chlorine by pretreatment prior to membrane exposure.

Related Products for use with TW30-1812-100HR

Membrane Housing for use with DOW FilmTec Home RO Membranes
F-4ME2QC Elbow Fitting for Home RO Membrane Housing

To use a FilmTec membrane in a system with a non-standard housing, simply replace membrane housing (and appropriate plumbing connections) with a standard housing.  

Benefits of DOW FilmTec Home RO Membranes

  • New advanced membrane chemistry can achieve stabilized salt rejection of 98%.
  • High active membrane area and twin leaf design for optimized performance
  • Robust in high hardness water applications
  • NSF58 safety Certification
  • Fully-automated manufacturing that ensures consistent and high quality elements
  • Shiopped dry for convenient handling and longer shelf-life
  • Proven consistency and reliability for longer membrane life

Applications for FilmTec Residential RO Membranes:

  • Under the sink water treatment
  • Point-of-use reverse water treatment systems
  • Production of home drinking water
  • Office
  • Aquariums 
  • Institutions 
  • Restaurants
  • Ice Makers
  • Labs
  • Point of Use RO System

Physical Dimensions of DOW FilmTec TW30-1812-100HR

DOW FilmTec Home RO Membrane Drawing  
A 11.74 (298)
B 1.17 (30)
C 0.68 (17)
D 1.75 (44.5)
E 9.4 (239)

TW30-1812 Home Drinking Water elements seal at a standard 2.0 inch – 2.05 inch I.D. within pressure vessels