SKU: 43929320823

4"x40" | 2,500 GPD | Low Energy| Fiber Wrapped | DuPont FilmTec (LC LE PRO-4040 Replaces DOW LC LE-4040)

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Description

4"x40" | 2,500 GPD | Low Energy| Fiber Wrapped | DuPont FilmTec (LC LE PRO-4040 Replaces DOW LC LE-4040)FILMTEC LC LE PRO 4040 Low Pressure (Low Energy) Commercial RO Membrane Element Direct Replacement for DOW FilmTec LC LE 4040 FilmTec LC LE PRO 4040 Elements deliver high quality water at low pressure at harsh water conditions, using technology for low energy commercial applications. DuPonts fully automated element production enables consistent products and minimizes the total cost of ownership of water treatment systems. DuPont Filmtec (Formerly DOW



FILMTEC™ LC LE PRO-4040 Low Pressure (Low Energy) Commercial RO Membrane Element

Direct Replacement for DOW FilmTec LC LE-4040

FilmTec LC LE PRO-4040 Elements deliver high quality water at low pressure at harsh water conditions, using technology for low energy commercial applications. DuPont’s fully automated element production enables consistent products and minimizes the total cost of ownership of water treatment systems.

DuPont Filmtec (Formerly DOW FILMTEC) Brackish Water Reverse Osmosis Elements separate salts from water and are produced with an automated fabrication process for precision, consistency, and reliability. 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.

FILMTEC LC LE PRO-4040 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.

FILMTEC LC LE PRO-4040 is the direct replacement for DOW FilmTec LC LE-4040, which has been discontinued by the manufacturer.

Specifications for LC PRO LE-4040

FilmTec Product: LC LE PRO-4040
FilmTec Part Number: 12081512
Replaces Models:
 LC LE-4040, 356603, 356602, LE-4040, 275173
BW30LE-4040
Size (Approximate): 4" Dia. x 40"L
Flow Rate: 2,600 gpd (985 m³/d)
Applied Pressure: 125 psig (8.6 bar)
Stabilized Salt Rejection: 99.5%
Minimum Salt Rejection: 99.0%
Single Element Recovery: 15%
Exterior: Hard Shell Fiberglass
Active Area: 94 sq. ft.
Membrane Type:
 Polyamide Thin-Film
Composite

Permeate flow and salt rejection based: 2,000 ppm NaCl feed stream, 77°F, 15% recovery, pH 8, 125 psig.

Operating Limits for LC LE PRO-4040

Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 600 psig (41 bar)
Maximum Pressure Drop: 15 psig (1 bar)
Maximum Feed Flow Rate: 16 gpm (3.6m³/h)
pH Range, Continuous Operation*: 2-11
pH Range, Short-Term Cleaning**: 1-13
Maximum Feed Silt Density Index: SDI 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.

Key Features and Benefits of DuPont LC LE PRO-4040 (DOW LC LE-4040) Low Pressure Membrane Element

  • LC LE PRO-4040 delivers high quality water at low pressure at harsh water conditions, using DuPont’s innovative, proprietary technology for low energy applications.
  • Industry leading active area (94 sqft) which provides less fouling due to lower operating flux while still achieving higher flow.
  • Offers high salt rejection at low pressure in harsh water conditions.
  • Provides most effective cleaning performance, robustness and durability due to its widest cleaning pH range (1 – 13) and chemical tolerance.

Key Applications for FilmTec LC LE PRO -4040 Commercial RO Membranes:

  • Light industrial applications requiring good permeate quality.
  • Harsh feed water condition.
  • Drinking water – Refilling stations, Bottling plants, Hotels, Schools, Institutions etc.

Physical Dimensions of DOW FilmTec LC LE PRO-4040

INCHES (MM)
A 40.0 (1,016)
B 1.05 (26.7)
C 0.75 (19)
D 3.9 (99)

LC LE PRO-4040 fits nominal 4x40 size pressure vessels.

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: 43929320823

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4.7 ★★★★★
Based on 27 reviews
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Product Reviews
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Verified Purchase
Richard H.
Phoenix, US
★★★★★ 1
These shoes ARE NOT LEATHER as advertised!
Size: 14, Color: Black
I own 4 pair of Marc Joseph shoes. All were Amazon advertised as Leather uppers and received as such. Made in Brazil out of real leather. Good quality shoes and a fair price. My recent purchases of 2 pair of Marc Jospeh shoes are Amazon advertised as" Leather Uppers". They are NOT leather and I sent them back to Amazon. Made in China. To me this is a bait and switch. Product descriptions should be honest and complete and reveal origin. My previous purchases stated "Made in Brazil" and "Leather Uppers." Since they were Marc Joseph, I thought these 2 recent pair were creditably described so I ordered based on my prior satisfied experience. Shame on me. Marc Joseph has lost a loyal customer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2025
A
Verified Purchase
Amazon Customer
Grantham, US
★★★★★ 5
Great shoes
Size: 12, Color: Black
These are great. We buy them again and again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
W
Verified Purchase
William J Becker Sr
Louisville, US
★★★★★ 5
Sleek and classy loafer
Size: 10.5, Color: Black
Was skeptical on this purchase but I have to say, well worth it. Not super expensive but very comfortable. Wears well for summer dress attire for taking your lady out for a dinner or show. Casual yet classy. Not a bad buy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
A
Verified Purchase
Amazon_Customer
Phoenix, US
★★★★★ 5
The "Lazy Professional" Look: Is Hands-Free Luxury Actually Real?
Size: 9.5, Color: Black Napa Leather
Living down here in Florida, my footwear needs are pretty specific. It’s hot, it’s humid, and I spent half my life rushing from the car into work or a meeting. I’ve reached that age where I value efficiency just as much as style—maybe more. I’ve been eyeing the Marc Joseph New York Hands-Free Slip-on Penny Loafers for a while, and after putting them through the wringer, here is the honest truth from someone who just wants to look sharp without the hassle. The "Just Step-In" Reality Look, the big selling point here is the "Hands-Free" tech. We’ve all seen the commercials for those athletic slip-ins, but finding that in a legitimate leather penny loafer is a different game. Does it work? Yes, surprisingly well. The heel counter is firm enough that it doesn’t collapse when you slide your foot in, but it doesn’t feel like a piece of plastic digging into your Achilles once you’re in. For those of us who are tired of bending over or hunting for a shoehorn every morning, this is a genuine quality-of-life upgrade. The Florida Factor: Comfort and Style The leather is actual calfskin (on most models), which is a must for the Florida heat. Synthetic shoes turn into a sauna within ten minutes, but these breathe reasonably well. The aesthetic is classic—it’s a "professor" shoe through and through. You can wear them with chinos and a blazer for work or throw them on with some nice jeans for a weekend lunch. Inside, they’ve got a gel heel insert and a padded footbed. It’s not quite "walking on a cloud"—let’s not over-hype it—but it’s a massive step up from the hard, flat soles of traditional dress loafers. I’ve spent four hours on my feet lecturing, and my arches didn’t hate me by the end of the day. The Sizing Gamble Here’s where you need to be careful. The consensus from other guys (and my own experience) is that the sizing is a bit of a coin toss. They tend to run a little large and sometimes wide. If you have narrow feet, you might find the sides "gaping" or flaring out when you walk, which kills the sleek look. I’d recommend ordering a half-size down if you’re usually between sizes. The Breakdown The Pros: True Hands-Free: You can actually put these on while holding a coffee and a briefcase. No hands needed. Legit Materials: The calf leather feels premium and smells like the real deal. Versatility: Perfectly bridges the gap between a "car shoe" and a formal loafer. Comfort: The gel insert makes a noticeable difference for long-duration wear. The Cons: Sizing Inconsistency: They can run wide, leading to some "heel slip" if you don't get the perfect fit. Break-in Period: The heel is stiff by design (to allow for the slip-on feature), so expect a day or two of minor stiffness. Price Point: They aren't cheap, though often on sale. Value for Money Are they worth it? If you’re comparing them to high-end Italian brands that cost $500, these are an absolute steal. They look 90% as good for a fraction of the price. However, if you're used to $60 mall shoes, the jump to $150+ might feel steep until you realize you’re paying for the convenience of never having to touch your shoes to put them on. For a daily driver in a professional setting, the value is definitely there.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2026
E
Verified Purchase
Edward A. Cleveland
Louisville, US
★★★★★ 5
Step In Look Good
Size: 11.5, Color: Cognac Napa Leather
I am wearing these shoes as I write this review, and they look and feel great. I have a bit of a disability with drop foot on the right leg and bilateral neuropathy and have been wearing step in shoes for about 10 years. But the first company that introduced leather dress and casual shoes stopped making them and now only makes sport and casual shoes. So I have been searching for some that meet my need for shoes like this and this company has given me three pairs, so far. Easy to get into, comfortable to wear, and good looking. And they take polish very well, too. (Remember how to do that?). We may buy another pair or two in different styles as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026

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