PWG RO Membrane 4040

Name: Ultra Soft Water Softeners Ltd
SKU: 5ed93c184425g3da
Rating: 5 (241 reviews)

Price range: £470.00 through £480.00 Incl. VAT

Our PWG 4040 RO membranes are low energy, high production membranes capable of high permeate flow rates up to 522 litres per hour. Suitable for use with all industry standard 4″ x 40″ membrane housings, and as a retrofit for RO systems that utilise 4040 membranes. Offering a stabilised rejection rate of 99.3% at an operating pressure of 10.5 bar – compatible with most commercial RO applications.

Product Features

High permeate flow rate of up to 522 litres per hour
Energy efficient without compromising production
Suitable retrofit for other 4040 membranes
Average rejection rate of 99.3%

Choosing RO Membrane

When selecting an RO membrane you should ensure that your application parameters meet the feed requirements stipulated to ensure optimum performance and water quality. You should consider things such as feed pressure, permeate flow (production rate) and rejection rates. For help choosing or cross-referencing a suitable membrane please speak to a member of our team.

Help & Advice

Need help or advice on which size to choose? No problem, drop us an email, start a live chat or give us a call on 01622 933 853 and we’ll be sure to help.

PWG RO Membrane 4040

£470.00 – £480.00 Incl. VAT

Membrane Type: No selection

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SKU: RO-RC2/3 Category: Reverse Osmosis Membranes Tag: Water Purification

PWG RO MEMBRANES

High Production 4040 Membranes

PWG’s range of 4040 RO membranes have been developed with energy efficiency in mind, whilst maintaining the high rejection rates required for industrial, municipal and waste-water recovery processes. The high permeate flow offered by these membranes ensures they are suitable for a range of commercial applications, as a retrofit or an upgrade to an existing installation.

PWG 4040ND RO Membrane
The PWG 4040ND RO membrane runs at pressures as low as 6.9 bar and is a suitable alternative to Oltremare LOW1-4040, Hydranautics ESPA1-LD-4040 and Axeon HF1-4040 membranes.

PWG 4040HF RO Membrane
The PWG 4040HF RO membrane is designed to run at a higher operating pressure of 15.5 bar and produces the highest permeate flow rate of all 4040 membranes on the market. This high flow membrane is a suitable alternative to the Oltramere LOW1-4040-XL.

Why Choose PWG 4040 RO Membranes?

High permeate flow rates from 410 to 520 litres per hour
Designed for use in commercial grade RO systems
High operating temperatures up to 45⁰C
Supplied tape wrapped with brine seal
High flow or standard options

Compatible Products:
Commercial RO Systems
Stainless Steel RO Membrane Housing

Product Resources:
PWG RO Membranes Data Sheet →

Reverse Osmosis Solutions

We’re pleased to offer a comprehensive range of reverse osmosis solutions, from full systems to replacement membranes and accessories. Can’t find exactly what you’re looking for? Get in touch with a member of our team today.

Browse all Reverse Osmosis solutions →

Additional Information

Brand: No selection	PWG
Dimensions: No selection	ATD Diameter 100.3mm Connection Diameter 19.1mm Core Tube Feed Size 26.7mm Length 1016mm
Weight: No selection	3.6kg
Permeate Flow: No selection	4040: 410 litres per hour 4040HF: 520 litres per hour
Average Rejection Rate: No selection	99.3%
Pressure Drop: No selection	0.7 Bar
Max Operating Temperature: No selection	45°C
Max Operating Pressure: No selection	20.7 Bar (300 PSI)
pH Range: No selection	3-10

     
 
 
      Posted on Google  
  
 
   Pete Cossar 
 7 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Very pleased with the service. There was an issue with the water softener I ordered initially, but then following communications made the replacement process quite pleasant. Happily recommend this company. Thanks to Becky for working with me. Great follow up support 😊😊😊
  
 
     Posted on Google  
  
 
   Michael Fey 
 2 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Very Pleased with the services from the Sales Team
  
 
     Posted on Google  
  
 
   Guy Brennan 
 26 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. First time using this company and product and i wasnt dissappointed. Communication was easy and quick resulted in an easy order and now having fitted the filter i can say its a great product easy to install and appears good quality apart from the four mild steel bracket screws stainless would have been better considering the environment these are fitted. All in all, very pleased and would highly recommend .
  
 
     Posted on Google  
  
 
   Graham Quinn 
 25 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Easy to order and fast delivery
  
 
     Posted on Google  
  
 
   Steve Griggs 
 14 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Excellent local company and genuinely lovely people to deal with. Really helpful and knowledgeable, with great advice about my water softener and the correct salt to use. They even gave me some resin cleaner at no charge, which was a very kind gesture. Fantastic friendly service and I’ll definitely be returning for my salt in future. Highly recommended.
  
 
     Posted on Google  
  
 
   Don Carless 
 7 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service.  Product proved my softener was not working as it should.  I fully serviced it and cleaned with Resin Clean returned to service and it is now working as designed.  Very pleased.
  
 
     Posted on Google  
  
 
   J P 
 27 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. If you're thinking about a water softener then i HIGHLY recommend Ultra Soft Water Softeners Ltd.

Great softeners and exceptional customer service. The water softener I bought needed some adjustments with the installation setup where I supported throughout. The customer service is honestly next level. I had countless calls with Becky Gillett, the Sales Manager, over a period of months to get to the bottom of it. She was incredibly patient with me, staying on the phone and doing video calls to walk me through the programming instructions step-by-step while I changed the settings and ensured all was installed correctly.

All the staff here have been great, but Becky really stuck with me from start to finish to make sure it was sorted and working well. It runs like a dream now.

HIGHLY recommend them!
  
 
     Posted on Google  
  
 
   Chris Collins 
 26 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Easy to order, good prices and delivered on time. What more can you ask for.
  
 
     Posted on Google  
  
 
   John L 
 26 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Good rapid & efficient service
  
 
     Posted on Google  
  
 
   Tony Hybel 
 17 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. Easy to order, quick delivery, good communication. Resclean worked a treat; one treatment cycle and soft water is back again from our 12 yr old softener!

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PWG RO Membrane 4040

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PWG RO Membrane 4040

High Production 4040 Membranes

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