SKU: 82397697087

2.5"x21" | 325 GPD | Tape Wrapped | DOW FilmTec RO Membrane

$114.10 $126.78
Save 10%
No.2 Bestseller on watersyst.com >

Pay in installments of $31.70 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

2.5"x21" | 325 GPD | Tape Wrapped | DOW FilmTec RO MembraneDOW FILMTEC TW30 2521 Brackish Water Reverse Osmosis Membrane Element DOW FILMTEC TW30 2521 Elements produce high quality water for small commercial systems. DOW FILMTEC TW30 2521 elements are tape wrapped. In addition to high quality water and low energy costs, DOW FILMTEC membranes also deliver savings by providing long lasting and reliable performance. DOW FILMTEC Brackish Water Reverse Osmosis Elements can separate salts from water and are





DOW FILMTEC™ TW30-2521 Brackish Water Reverse Osmosis Membrane Element



DOW FILMTEC TW30-2521 Elements produce high quality water for small commercial systems. DOW FILMTEC TW30-2521 elements are tape-wrapped. In addition to high quality water and low energy costs, DOW FILMTEC membranes also deliver savings by providing long lasting and reliable performance.



DOW FILMTEC Brackish Water Reverse Osmosis Elements can separate salts from water and are produced with an automated fabrication process for precision, consistency, and reliability. DOW FILMTEC RO membranes build on a tradition of leadership in the thin-film composite membrane industry and meet the challenges of higher rejection in lower-pressure operations.



DOW FILMTEC TW30-2521 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.



Specifications for TW30-2521



FilmTec Product:

TW30-2521


FilmTec Part Number:		 80641
Size (Approximate): 2.5" Dia. x 21"L


Flow Rate:

325 gpd (1.23 m³/d)


Applied Pressure:

225 psig (15.5 bar)


Stabilized Salt Rejection:

99.5%


Active Surface Area:

13 Sq. Ft.


Single Element Recovery:

5%


Exterior:

Tape-Wrapped


Membrane Type:

Polyamide Thin-Film


Composite

Permeate flow and salt rejection based: 2,000 ppm NaCl feed stream, 77°F, 8% recovery, 225 psig.



Operating Limits for TW30-2521



Maximum Operating Temperature:

113°F (45°C)


Maximum Operating Pressure:

600 psig (41 bar)


Maximum Pressure Drop:

13 psig (0.9 bar)


Maximum Feed Flow Rate:

6 gpm (1.4m³/h)


pH Range, Continuous Operation*:

2-11


pH Range, Short-Term Cleaning**:

1-13


Maximum Feed Silt Density Index:

5


Fere Clorine Tolerance***:		 <0.1ppm

*Maximum temperature for continuous operation above pH 10 is 95°F
**Refer to cleaning guidelines.


***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 TW30-2521

PV2521PVCAU

PVC Membrane Housing Pressure Vessel for 2.5" x 21" Membrane Element
PV2521SSAU-316

Stainless Steel Membrane Housing Pressure Vessel for 2.5" x 21" Membrane Element



Benefits of DOW FilmTec Commercial RO Membranes



  • Reverse Osmosis water treatment removes up to 99% of total dissolved solids from water.


  • High flux results in high yields


  • High rejection provides good water quality


  • FilmTec performance and quality



Common Applications for FilmTec TW30-2521 Commercial RO Membranes:



  • Commercial Water Treatment Systems


  • Food Service


  • Medical and Research Institutions


  • Hospitality Industry



Physical Dimensions of DOW FilmTec TW30-2521

INCHES (MM)
A

21.0 (533)
B

1.19 (30)
C

0.75 (19)
D

2.4 (61)

TW30-2521 Fits nominal 25x21 size pressure vessels.

For more information, please visit this products webpage.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 82397697087

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 13 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
T
Verified Purchase
Tucker K.
Lowell, US
★★★★★ 4
Nice product. High quality microfiber to go with it.
Size: 16 Fl Oz (Pack of 1)
This product is a nice value for the price. It appears to be a high quality product. As someone just using it recreationally to clean my car every now and then, it seems that it protects very well. It leaves the interior of my car smelling alright and with a nice glossy shine. There is a decent amount in the bottle and its easy to spray on. If you are just using it to wipe dust off the dashboard or something like that, i'm quite sure that the dust will return not too long after you use it. It seems that it protects more for drying out and stains. The microfiber cloths it comes with feel high quality!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 8, 2025
J
Verified Purchase
JW tucson
Pawtucket, US
★★★★★ 5
Amazing product at a reasonable price
Size: 128 Fl Oz (Pack of 1)
This stuff is incredibly versatile! I use it for anything inside the car to clean it. The best part is it doesn’t leave any sort of greasy residue at all and it wipes off extremely clean. You will not be sorry whatsoever if you purchase this. I’d recommend using a brush in areas that need a little bit more work as this suds up very nice and becomes a good cleaning solution!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 18, 2025
I
Verified Purchase
Ishaye W.
Fort Morgan, US
★★★★★ 5
High quality microfiber towels and great interior cleaner
Size: 16 Fl Oz (Pack of 1)
The towels are way better than the ones i got with the old starter kit i bought from chemical guys
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026
S
Verified Purchase
Samuel Long
Port Orchard, US
★★★★★ 5
The best interior product
Size: 128 Fl Oz (Pack of 1)
I am a Turo host and I buy this in bulk because it is the best interior cleaner! All purpose and works on every surface I’ve come across. It has a very light smell to it, but it’s pleasant and just smells clean.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 16, 2025
T
Verified Purchase
the menace
Carnegie, US
★★★★★ 5
wow, ahead of the rest, easy to use
Style: Headlight Restore & Repel Kit
wow, i have used a lot of products for my cloudy headlight lens. this was the easiest and the best so far. on a dry clean headlight, open the foil envelope and get the wipe out, wipe the cloudy headlight and it really gets the job done, a yellow stain builds up on the wipe. one wipe for each headlight. wipe dry with microfiber, then spray the sealant and let it sit, just wipe any excess run off on the car body. poof, done! looks good. says it can last up to 18 months. not sure about that, but i will take what i have now. go nu finish, another solid product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026

recommand products

Dusk At Brancaster
1250.00
Looking This Good has been 91 Years in Making Men's T-shirt Blue Birthday Gift 00441
20.00
Looking This Good has been 50 Years in Making Men's T-shirt Blue Birthday Gift 00441
20.00
Looking This Good has been 42 Years in Making Men's T-shirt Lemon Birthday Gift 00442
20.00
Looking This Good has been 52 Years in Making Men's T-shirt Blue Birthday Gift 00441
323.50