4″ RO System Membrane Housing | FRP Pressure Vessel 300‑1200 PSI for 1‑6 Membrane Elements (End Port / Side Port)

  • FRP construction for high strength, corrosion resistance, and extended service life
  • Supports a wide working pressure range: 300 PSI to 1200 PSI
  • Optional End Port / Side Port designs to meet different piping layouts
  • Fits 1 to 6 standard 4040 RO membrane elements
  • Smooth inner surface reduces scaling and energy loss
  • Suitable for industrial wastewater treatment, brackish water desalination, water reuse, and ultrapure water production

4″ Side Port RO System Membrane Housing 
Pressure ratings available: 300 PSI, 450 PSI, 600 PSI, 1000 PSI, 1200 PSI
Feed port sizes: 1″
Standard permeate port size: 1/2″
Usable length supports loading 1 to 6 membrane elements
Models available to fit installation configurations holding 1 to 6 standard 4040 RO membrane elements
4″ End Port  RO System Membrane Housing 
4 x 40 ro membrane housing ratings available: 300 PSI, 450 PSI, 600 PSI, 1000 PSI, 1200 PSI
Feed port size: 3/4″
Standard permeate port size: 1/2″
Usable length supports loading 1 to 6 membrane elements
Length options available to accommodate 1 to 6 standard 4040 RO membrane elements

MODEL

ro system membrane housing end port
END PORT
ModelDesign/Operating
Pressure
Max.. Operating
Temperature
Min. Operating
Temperature
Qualification
Pressure
Element Length
4040C300E300Psi / 21 Bar150°F / 66°C14°F / -10°C1800Psi / 126 Bar40" X (1-8)
4040C450E450Psi / 31 Bar150°F / 66°C14°F / -10°C2700Psi / 186 Bar40" X (1-8)
4040C600E600Psi / 41 Bar150°F / 66°C14°F / -10°C3600Psi / 246 Bar40" X (1-8)
4040C1000E1000Psi / 69 Bar150°F / 66°C14°F / -10°C6000Psi / 414 Bar40" X (1-8)
4040C1200E1200Psi / 83 Bar150°F / 66°C14°F / -10°C7200Psi / 498 Bar40" X (1-8)
SIDE PORT
ModelDesign/Operating
Pressure
Max.. Operating
Temperature
Min. Operating
Temperature
Qualification
Pressure
Element Length
4040C300S300Psi / 21 Bar150°F / 66°C14°F / -10°C1800Psi / 126 Bar40" X (1-8)
4040C450S450Psi / 31 Bar150°F / 66°C14°F / -10°C2700Psi / 186 Bar40" X (1-8)
4040C600S600Psi / 41 Bar150°F / 66°C14°F / -10°C3600Psi / 246 Bar40" X (1-8)
4040C1000S1000Psi / 69 Bar150°F / 66°C14°F / -10°C6000Psi / 414 Bar40" X (1-8)
4040C1200S1200Psi / 83 Bar150°F / 66°C14°F / -10°C7200Psi / 498 Bar40" X (1-8)

APPLICATION

small industrial water treatment

Small‑scale Industrial Water Treatment

Electronics Industry
In processes such as semiconductor and microchip manufacturing, high-purity deionized water is required for cleaning, etching, and other production steps.
Pharmaceutical Industry
Used for the preparation of purified water in pharmaceutical processes. Since pharmaceutical production demands extremely high water quality, 4040 ro membrane housing can be applied in small-scale pharmaceutical workshops or laboratories.  formulation, and other processes.
Food & Beverage Industry
During beverage production, brewing, and related processes, feed water must be purified. The system can remove odors, colors, microorganisms, and some minerals, improving taste and quality, and ensuring the safety and consistency of food and beverage products.

small commercial water treatment-

Small‑scale Commercial Water Treatment

Office Buildings & Hotels
Provides water treatment for central air-conditioning systems, domestic water supply, and other facilities in office buildings and hotels. The system can remove hardness ions to prevent scaling, extend equipment lifespan, and supply high-quality water for daily drinking, washing, and other uses.
Beauty Salons & Gyms
These facilities also have specific water quality requirements. For example, beauty salons need soft water to prevent impurities from affecting hair and skin, while gyms require clean and hygienic water for showers. The 4×40 ro membrane housing can be used in small-scale water treatment equipment to provide suitable water quality for these applications.

Countriside water treatment-

Domestic Water Treatment

Villas & Large Households
For families with high water quality requirements, especially those needing direct drinking water, the 4 inch ro membrane housing can be installed in home water treatment systems. When used alongside other filtration devices, it removes harmful substances from water, providing safe and healthy drinking water.
Rural or Remote Areas
In some rural or remote locations with limited water supply, groundwater or surface water may have poor quality, containing sediments, bacteria, heavy metals, and other contaminants. Small-scale reverse osmosis systems with 4‑inch membrane housings can treat these water sources, improving water quality and meeting basic household water needs.

PACKING

FAQ

What is the typical production lead time for your membrane housings?

It depends on the quantity. For regular orders, the production lead time is around 15 days (excluding items that are in stock).

Available pressure ratings include:
300 PSI
450 PSI
600 PSI
1000 PSI
1200 PSI
(Other custom pressure ratings can be provided based on application requirements.)

Shell: Fiber-reinforced epoxy resin (FRP)
Inner liner: High-strength polyethylene (PE) or polyurethane
End caps & adapters: Stainless steel / Engineering plastics
These materials ensure corrosion resistance, light weight, and long service life.

Yes. We offer high-pressure models (1000 PSI and above) suitable for seawater RO systems. The smooth inner surface also helps reduce pressure loss and fouling.

Typically:
Open the end cap
Insert thrust ring
Lubricate O-rings
Push membrane element in direction of concentrate outlet
We provide detailed installation manuals upon shipment.

  1. Yes, we provide a free goods inspection service. If your supplier is within 200 km of our company (Chengdu), even the transportation cost will be covered by us. If the distance is more than 200 km, only the transportation and hotel costs will be borne by you.

Yes, for each item, there will be a minimum order quantity, and then we can produce an OEM order for you.

 

Yes, whether they are water- or wastewater-related products, we can source them for you. We have been working in the water and wastewater fields for more than 10 years.

RELATED PRODUCT

RELATED PRODUCT

Scroll to Top

Send your inquiry today