PurePro TW30-1812 Reverse Osmosis Membrane.

Processes 50-200 gallons per day, depending on model selection. PurePro TW30 RO replacement RO  membrane that fits most standard RO systems.  PurePro reverse osmosis  TFC membranes are world-class high-performance membranes  ideally suited for residential applications.

ANSI/NSF certified component Standard 58

Replacement Reverse Osmosis Membrane | PurePro



Description -Replacement RO Membrane  |PurePro

Purepro TW30-1812 Reverse Osmosis Membrane.  Pure-Pro  USA Brand  Processes 50 -200 gallons per day.( Depending on model selection) Pure Pro TW30  replacement RO membrane  that fits most  standard residential and commercial RO systems. 


Used In:

  • Under the sink water treatment
  • Point-of-use reverse water treatment systems
  • Production of home drinking water


  • High flux results in greater yield (more water)
  • Shipped dry for long shelf life
  • PurePro performance and quality
Filter model: PurePro TW30-1812 membrane.
Size: 11.75″ x 1.8″
Flow Rate: 50 gallons per day @ 60 psi water pressure up to 200 gallons per day
Average NaCl Rejection rate: 98%
Fits following Brands: FilmTec, GE Osmonics, PENTEK, U.S. Water ( US Water ), Culligan, Ametek, US Filter, American Plumber, Kinetico, Watts, Purepro and more.
ANSI/NSF certified component Standard 58
 Some general guidelines on replacment RO membranes:
Operating Limits • • • • • • • • • • • • • • • • •
Membrane Type Polyamide Thin-Film Composite
Maximum Operating Temperature 113°F (45°C)
Maximum Operating Pressure 1,000 psi (69 bar)
Maximum Pressure Drop 15 psig (1.0 bar)
pH Range, Continuous Operationa 2 – 11 pH Range, Short-Term Cleaning  1 – 13
Maximum Feed Silt Density Index SDI 5
Free Chlorine Tolerancec <0.1 ppm
Maximum temperature for continuous operation above pH 10 is 95°F (35°C)
Refer to Cleaning Guidelines in specification sheet 609-23010. Under certain conditions, the presence of free chlorine and other oxidising agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, PurePro recommends removing residual free chlorine by pre-treatment prior to membrane exposure.

Important Information- RO Membranes

Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper start-up sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved. Before initiating system start-up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed.
Membrane Storage

Store membranes in a cool area out of direct sunlight. Membrane storage temperature limits are 22°F-113°F (-5.5°C to 45°C)

Preserve in a solution of 2% AM-88 Membrane Preservative, and 20% AM-225 Glycerine. This will not prevent freezing below 32°F, but the crystals are soft and the membrane is not damaged.

Keep new elements in original packaging.

Examine the preservative in preserved elements every 3 months. If not clear, remove and re-preserve. The pH of the preservative should not drop below 3.

Storage time for preserved elements is 6 months to 1 year.

Storage time for dry (new) elements is unlimited, and these can withstand temperatures below 22°F.

Membrane Shipping

Preserve the element in the plastic bag using the recommended procedure. Make sure the plastic bag does not leak and the element is properly identified.

Make sure the preservative solution is correctly labeled.

Protect the element package from physical damage.

System Shut-Down or Long periods of non-usage

Clean the membranes in the system using the cleaning procedure.

Circulate the preservative solution.

Shut down the system and close valves to prevent air entering the system.

Check preservative once a month.

Note:  When the thin-film membranes manufactured they are dry. These dry membranes have an indefinite shelf life, when stored properly. Membranes become wet when they are flushed or tested with water. Once wet, the membranes can not be dried. The wet membranes must be preserved to prevent the growth of micro-organisms on them. This is done usually by using a 1-2% solution of sodium metabisulphite.

Quality Assurance:

Enhanced quality control throughout the entire production process; eleven different quality checks monitor all critical dimensions and product characteristics. 100% of all PurePro residential elements must pass an element integrity test before packaging to ensure our customers receive defect-free products.

The increased capacity, advanced automation and quality control will allow us to keep providing high quality PurePro residential RO elements. PurePro understands that quality products provide critical support for your reputation in the market place, and help increase customers’ satisfaction with your products.

What does a Reverse Osmosis System Remove?

A reverse osmosis membrane will remove impurities and particles larger than .001 microns.


Elements and the Percent R.O. Membranes will remove
85 – 94%
96 – 98%
94 – 98%
85 – 95%
60 –75%
94 – 98%
95 – 98%
95 – 98%
94 – 96%
96 – 98%
95 – 98%
92 – 96%
94 – 98%
96 – 98%
85 – 92%
94 – 98%
95 – 98%
95 – 98%
84 – 92%
85 – 92%
% may vary based on membrane type water pressure, temperature & TDS


Additional information

Weight 1 kg
Dimensions 30 x 5 x 5

50, 80, 100, 200