Discontinued - 36 GPD | 1.8x12 | DOW FilmTec Home RO Membrane Element

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More Information
Brand DOW Filmtec
TW30-1812-36 Has been discontinued by the manufacturer and is no longer available. AMI  Brand M-T1812A36  36 GPD RO Membrane may be used as a direct replacement.  

DOW FILMTEC™  TW30-1812-36 Home RO Membrane Element Has been Discontinued by the Manufacturer and is no longer available.

The below product information is retained for reference purpose only.

DOW FilmTec Membrane Elements

DOW FILMTEC™  TW30-1812-36 Home RO Membrane Element
Direct replacement:  M-T1812A36

DOW FILMTEC TW30-1812-36 Elements for home drinking water treatment units produce 36 GPD (5.7 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 TW30-1812-36 elements have been tested and certified by NSF International against NSF/ANSI Standard 58 for material requirements only for safe use in drinking water applications.  

DOW FILMTEC TW30-1812-36 Elements is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.

Product Specifications


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


Specifications for TW30-1812-36 for Reference Only

Obsolete FilmTec Part Number: TW30-1812-36
Direct AMI Replacement:  M-T1812A36
Closest FilmTec Replacement:
(requires flow restrictor change)

Flow Restrictor:
Size (Approximate): 1.8" Dia. x 12"L*
Flow Rate: 36 gpd  (5.7 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 TW30-1812-36

Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 150 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.

Physical Dimensions of DOW FilmTec TW30-1812-36

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