Skip to content

SW30-4021 FilmTec™ DOW / DuPont 800 GPD at 800 PSI 4 x 21 inch Desalination Machine Watermaker Seawater Membranes

Marsoni M251S
Sale price$255.04
Pay 4 payments of $63.76 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
SW30-4021 FilmTec™ DOW / DuPont 800 GPD at 800 PSI 4 x 21 inch Desalination Machine Watermaker Seawater MembranesSW30 4021 FilmTec DOW DuPont 800 GPD at 800 PSI 4 x 21 inch Desalination Machine Watermaker Seawater Membranes Financing Options Available at Checkout Via Shop Pay! PLEASE REFERENCE TABLE AND DATA SHEETS BELOW DuPont FilmTec SW30 4021 Seawater RO Element Product Description The DuPont FilmTec SW30 4021 is a compact, high performance Seawater Reverse Osmosis (SWRO) element built for reliable operation in small scale desalination and marine applications
Easy Shipping

Quick Dispatch:

Your SW30-4021 FilmTec™ DOW / DuPont 800 GPD at 800 PSI 4 x 21 inch Desalination Machine Watermaker Seawater Membranes orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your SW30-4021 FilmTec™ DOW / DuPont 800 GPD at 800 PSI 4 x 21 inch Desalination Machine Watermaker Seawater Membranes ships.

Need Help?
Questions about SW30-4021 FilmTec™ DOW / DuPont 800 GPD at 800 PSI 4 x 21 inch Desalination Machine Watermaker Seawater Membranes, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for SW30-4021 FilmTec™ DOW / DuPont 800 GPD at 800 PSI 4 x 21 inch Desalination Machine Watermaker Seawater Membranes in your area.

Get Shipping Estimates

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
4.7 ★★★★★
Based on 459 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
C
Verified Purchase
Chris
San Leandro, US
★★★★★ 4
4 lefts vs 2 rights
Size: Medium, Color: (001) Black / Black / Castlerock, Size: Medium, Color: (001) Black / Black / Castlerock
I ordered a set of three. I ended up with four left socks and two right socks lol. Granted it doesn’t matter unless you’re OCD. JEEZ. Love the socks but not the attention to detail the sock company did on matching left/right marked socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
J
Verified Purchase
Jill
Dallas, US
★★★★★ 5
My favorite socks
Size: Medium, Color: (001) Black / Black / Castlerock
I love love, love the left and right socks one has an L one has an R and they fit so well and they’re so comfy for running jogging or walking. They are my favorite socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026
V
Verified Purchase
vbgirlfla
Grantham, US
★★★★★ 5
Hold up to tough wear - definitely recommend
Size: X-Large, Color: (001) Black / Black / Castlerock
These are my teens favorite socks. We've ordered multiple sets. Given that he tends to wear then as slippers I am really impressed with how they hold up. The extra large size is great for bigger feet. They wash well and I didn't notice any shrinkage, fading or pilling. This set is going to college with him.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
J
Verified Purchase
Jana
Louisville, US
★★★★★ 5
Good quality
Size: Large, Color: (400) Royal / White / Mod Gray
To big! I am female size 9 and Amazon was recommending for me size L. Yes, my socks is wearing my boyfriend. I need to buy smaller size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 13, 2025
J
Verified Purchase
Justin
San Leandro, US
★★★★★ 5
Great Socks.
Color: (002) Black / Black / Halo Gray, Size: Large
These are awesome and have become my favorite socks to have for everyday wear. I have since bought the hightop version as well and there are just as equally great. They fit almost like compression socks. Color does fade a bit after repeated washing but not enough to make a big difference in appearance. They have lasted for a long time and still going. They have lots of cushion which makes it very comfortable to wear.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026

recommand products