BasideWT- Whole Home Water Filtration System & Replacement
Extra Low Pressure ULP 4040 RO Membrane Element – 4 x 40 Inches for Low TDS Water
PRODUCT PARAMETERS
Introduction: Why the 4040 RO Membrane Matters
Reverse osmosis technology is crucial for clean water production, and the 4040 membrane is a game-changer for industrial and commercial applications. But what makes it stand out?
Unlike standard membranes, the ULP membrane operates at extra-low pressure, reducing energy costs by up to 30% (Source: Water Technology Journal, 2023). Plus, its 4 x 40-inch design ensures higher flow rates with compact installation.
In this guide, we’ll explore its benefits, compare it with alternatives, and share real-world insights—like how our team optimized a beverage plant’s filtration system in 2025 using this membrane.
Key Advantages of the 4040 RO Membrane
Energy Efficiency & Cost Savings
The ULP 4040 membrane requires lower operating pressure compared to traditional membranes (100+ psi). This means:
- ⚡ Lower electricity bills🔧 Reduced pump wear🌍 Smaller carbon footprint
High Rejection Rates & Durability
Most 4040 RO membranes boast:
- ✔ 98%+ salt rejection (ensuring pure water)
- ✔ Longer lifespan (3-5 years with proper care)
- ✔ Fouling resistance (thanks to advanced polyamide layers)
⚠ Note: Avoid high chlorine exposure—it degrades membrane performance!
4040 RO Membrane vs. Competing Models
Here’s a quick comparison table to help you decide:
| Feature | ULP 4040 RO Membrane | Standard 8040 Membrane |
|---|---|---|
| Operating Pressure | 50-100 psi | 150-200 psi |
| Energy Consumption | Low (30% less) | High |
| Footprint | Compact (4″ diameter) | Bulky (8″ diameter) |
| Best For | Small-to-medium systems | Large-scale plants |
Interesting fact: The 4040 size is ideal for modular setups, allowing easy scalability.
4040 RO Membrane Size
| A | 1016.0mm(40.0”) |
| B | 99.7mm(3.9”) |
| C | 19.1mm(0.75”) |
| D | 26.7mm(1.05”) |
Ideal Applications: Where This Membrane Excels
This isn’t a one-size-fits-all component. It serves specific scenarios perfectly. For instance, it’s ideal for polishing already-treated water. Consider these uses:
- Final purification after ion exchange or softeners.
- Low-TDS groundwater or river water treatment.
- Boiler feed water preparation.
- Laboratory pure water systems.
- Food and beverage processing lines.
Conversely, it is not suited for high-TDS seawater or brackish water. Matching the membrane to your source water is crucial for efficiency.
Technical Specifications & Performance Data
Making an informed decision requires clear data. The BasideWT ULP 4040 RO Membrane comes with reliable and tested specifications.
- Model: BasideWT ULP-4040
- Dimensions: 4 inches in diameter, 40 inches in length.
- Max Operating Pressure: 150 psi.
- Max Feed Temperature: 113°F (45°C).
- pH Range: 4 – 11 (continuous operation).
- Average Permeate Flow: 2,400 GPD (under standard test conditions).
- Minimum Salt Rejection: 99.0%
Specifically, always ensure your pre-filtration (like 5-micron sediment filters) is optimal. This protects the delicate membrane surface.
how to change 4040 ro membrane？
Step 1: Remove the Pressure Vessel
- Disconnect the inlet, concentrate, and permeate tubing from the pressure vessel housing.
- Use the appropriate housing wrench to loosen and remove the end caps.
- For larger RO systems, note that the pressure vessels may be mounted on a rack—ensure the system is depressurized before removal.
Step 2: Extract the Old Membrane
- Carefully slide the old membrane element out of the housing.
- Tip: Observe the membrane’s flow direction before removal. The feed side typically has the brine seal (a thicker O-ring).
- Dispose of the old membrane according to local regulations.
Step 3: Clean the Pressure Vessel
- Rinse the interior of the housing and the end caps thoroughly with clean water.
- Inspect the brine seal groove and all interconnector O-rings.
- Clean them properly and replace any O-rings that appear worn, cracked, or damaged.
Step 4: Install the New Membrane
- Lubricate: Apply a suitable, RO-compatible lubricant to the new membrane’s brine seal and all O-rings.
- Insert Correctly: Slide the new membrane into the housing with the feed end (brine seal side) entering first toward the inlet.
- Push the membrane in gently but firmly until it is fully seated.
- Important: Ensure the membrane’s concentrate (reject) outlet is perfectly aligned with the housing’s outlet port to prevent leakage or performance loss.
Step 5: Reassemble the Housing
Verify all connections are secure before restarting the system.
Reinstall the end caps and tighten them evenly using the housing wrench. Avoid over-tightening to prevent damage.
Reconnect all tubing to their corresponding inlet, concentrate, and permeate ports.
Common Mistakes & How to Avoid Them
Many users unknowingly harm their 4040 RO Membrane. Here’s what to watch for:
❌ High Chlorine Exposure – Even 1 ppm can degrade the membrane over time. Ignoring pH Levels – Keep feed water between 5-8 pH for longevity.Infrequent Cleaning – Clean every 6 months (or when flux drops 15%).
Real-World Case Study: Beverage Plant Optimization
In 2025, our team upgraded a bottling facility’s RO system with ULP 4040 membranes. Results?
- 💧 20% higher flow rate
- 💰 $12k/year energy savings
- 🔄 Fewer membrane replacements
The key? Proper maintenance and regular monitoring.
RO Membrane Packaging
Related products
Water Treatment Accessories Selection Guide
Whole House Water Filtration System
The Whole House Water Filtration System – BasideWT is designed to deliver comprehensive water purification for residential and light commercial applications. Installed at the main water line, it filters all incoming water, ensuring every tap — from the kitchen to the bathroom — provides clean, fresh, and safe water.
UV Sterilizers
UV sterilizers provide an advanced, chemical-free solution for disinfecting water by using ultraviolet (UV-C) light to inactivate harmful microorganisms. Designed for high efficiency and long-lasting operation, these sterilizers ensure safe, pure, and biologically clean water for residential, commercial, and industrial water treatment systems.
RO Membrane
Reverse Osmosis (RO) Membranes are advanced filtration elements designed to remove a wide range of dissolved impurities from water by applying pressure to force water molecules through a semi-permeable membrane. These membranes are critical components in RO systems, delivering high-purity water for residential, commercial, and industrial applications.
Water Filter Housings
BasideWT water filter housings are durable, high-performance enclosures designed to hold filter cartridges securely and ensure efficient water purification across various applications. Engineered with precision and corrosion-resistant materials, these housings provide reliable protection for the filtration media while maintaining consistent flow and pressure throughout the system.
Water Filter Cartridge
BasideWT water filter cartridges are the core components of water filtration systems, responsible for removing suspended solids, chlorine, odors, organic matter, and other contaminants from water. Engineered with precision and made from high-quality filtration media, these cartridges ensure clean, safe, and great-tasting water for residential, commercial, and industrial applications.
Control Valves
Regulate flow direction, pressure, and operational cycles within filtration and softening systems.
Choose between manual, semi-automatic, or fully automatic valves depending on system complexity and maintenance needs.
Choose between manual, semi-automatic, or fully automatic valves depending on system complexity and maintenance needs.
Water Distributor for FRP Tanks
The water distributor is a crucial internal component of BasideWT FRP tanks, designed to ensure even water distribution and efficient utilization of the filter media during operation. A well-engineered distributor system maximizes filtration efficiency, prevents media channeling, and extends the service life of the tank and filter media.
Brine Tanks
BasideWT brine tanks are essential components in water softening systems, designed to store and prepare the salt solution (brine) used for regenerating ion exchange resin in softeners. Engineered with high-quality materials and user-oriented design, these tanks ensure consistent brine concentration, reliable regeneration cycles, and long-term durability.
Ion Exchange Resins
BasideWT ion exchange resins are high-performance polymer beads designed for efficient removal of hardness ions, dissolved salts, and contaminants in water treatment systems. They play a vital role in processes such as water softening, demineralization, and deionization, ensuring high water purity and system reliability.
Water Pressure Gauge
A Water Pressure Gauge is an essential instrument used to measure and display the pressure of water within a system. It helps ensure optimal operating conditions and prevents damage to pumps, filters, or pipes caused by excessive or insufficient pressure. BasideWT offers high-quality gauges designed for both residential and industrial water treatment applications.
Water Purifier Quick Connector
Water Purifier Quick connector are small fittings. They join water lines in purification systems. You find them in residential RO units. They connect membranes to housings. They link filters to faucets. Their design is brilliant. They allow push-to-connect installation. No tools are needed. No twisting or tightening.
FAQs
How do I know which system is right for my home?
How to Measure Your Home’s Water Flow Rate？
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