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Stainless Steel RO Membrane Housings


Our Stainless Steel RO Membrane Housings are designed to house either 4021 or 4040 RO membranes. Constructed from corrosion-resistant 304 Stainless Steel with a heavy duty end cap clamping system, these durable yet lightweight housings are popular for many commercial reverse osmosis applications. Suitable for RO system builds or to replace an existing membrane housing, they can be mounted either horizontally or vertically. The two twin port ABS end caps feature a double o-ring seal to ensure positive leak-free installation.

Why Choose Our Stainless Steel RO Membrane Housings?

  • Constructed from corrosion-resistant 304 Stainless Steel
  • Heavy duty end cap clamps and double O-Ring seal
  • Suitable for all 4021 and 4040 RO membranes
  • Can be mounted vertically or horizontally

Need Help With Our Stainless Steel RO Membrane Housings? Give us a call on 01622 933 853


Our Stainless Steel RO Membrane Housings are available in the two most popular sizes – 4021 (4” x 21”) and 4040 (4” x 40”). The strong ABS end caps and heavy-duty clamping system allow for operating pressures of up to 200psi, which ensures these high quality housings are able to withstand the rigors of ongoing RO water production. Commonly used in light commercial pure-water production applications such as food and beverage, window cleaning, surface finishing and aquatics.

These membrane housings are supplied with twin port ABS end caps and mounting brackets, allowing the end user to choose the mounting configuration and feed/filtrate orientation.

Key Product Information

  • 1/2” female BSPT ports (feed/permeate/concentrate)
  • Can be mounted horizontally or vertically
  • High operating pressure of up to 200psi
  • Supplied with mounting brackets
  • Seamless extruded housing body

Compatible Products

Need Help With Our Stainless Steel RO Membrane Housings? Give us a call on 01622 933 853


Suitable For

Reverse Osmosis, Pure Water Production, Window Cleaning, Aquatics, Surface Finishing, Light Commercial, Food & Beverage

Supplied With

Housing Body
2 x ABS End Caps
4 x O-Rings
2 x Heavy Duty End Cap Clamps
2 x Mounting Brackets


4021 Membrane Housing: Length 605mm x Diameter 102mm
4040 Membrane Housing: Length 1088mm x Diameter 102mm

Max Operating Pressure



304 Stainless Steel Body
ABS End Caps

Port Sizes

Inlet 1/2” BSPT-F
Permeate 1/2” BSPT-F
Concentrate 1/2” BSPT-F


Stainless Steel RO Membrane Housings Technical Drawing

frank woolnough
frank woolnough
The first time using this site, and im more than pleasd with the service and delivery of the product. Will use again no problem.
Gary Kinsley
Gary Kinsley
Excellent service, fast delivery (although there was no urgency) and great after sales service from Becky who's very helpful and knowledgeable.
Eamonn Dorling
Eamonn Dorling
Prompt and well informed service
Marco Polo
Marco Polo
This company gives the best customer service I have EVER EXPERIENCED in the UK. If every company gave this much care and attention to their customers the UK would easily lead the world in business. Truly ⭐️⭐️⭐️⭐️⭐️ I cannot recommend enough Marco Crawford
Gary Barbour
Gary Barbour
The team were brilliant offering great advice, very knowledgeable on their products and I will definitely be using them again!
Alice Sefton
Alice Sefton
Really great service, I wasn't too sure what size of water filter to order so sent in a picture, the size was identified and the new filters were with me a day after purchase.
Jill and Garry Clark
Jill and Garry Clark
Excellent service.
Matthew Durdy
Matthew Durdy
Prompt service and follow up. Like it should be.
Resin cleaner turned up on time and worked as expected. Great service - Will use again

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