Universal RO membrane reverse osmosis filter cartridge for household direct drinking water purifier suitable for 1812/3013 membrane housing

RO (Reverse Osmosis) membranes are a crucial water treatment technology commonly used in household water treatment systems. They are semi-permeable membranes capable of effectively filtering out most dissolved solids, bacteria, viruses, and other microorganisms in water, thus producing clean and pure drinking water.

Working Principle:The working principle of RO membrane involves the use of a semi-permeable membrane to separate water molecules from larger molecules or solid solutes. Water is forced through the RO membrane, while impurities dissolved in the water are retained on the other side of the membrane. This way, the RO membrane effectively removes impurities from the water, yielding high-purity water.

Filtration Efficiency:RO membrane can efficiently filter out many small particles and contaminants, including bacteria, viruses, heavy metals, chemicals, and other pollutants. It can eliminate odors, colors, and flavors from water, making it fresher.

Application Range:Home RO membranes are typically used in home water purification systems or filters. They help households obtain purer and safer drinking water, reducing the intake of pollutants and harmful substances in water.

Why RO Membranes Are the Heart of Your Water Purifier

Every sip of clean drinking water starts with a critical component: RO membranes. These semi-permeable barriers remove up to 99% of contaminants—from heavy metals to microplastics—making them indispensable in modern water systems. According to the 2023 Water Quality Association Report, households using quality RO membrane experience 50% fewer filter replacements compared to non-RO systems.

RO Membrane Structure

Dimensional schematic diagram

RO membrane performance parameters:

1812 vs. 3013 RO Membranes: Which Should You Choose?

Feature	1812 RO Membranes	3013 RO Membranes
Daily Output	50-75 gallons	100-150 gallons
Housing Size	18″ length x 1.2″ diameter	30″ length x 1.3″ diameter
Salt Rejection	92-96%	97-99%
Best For	Small households (1-3 people)	Large families/offices
Price Range	25−25−40	60−60−90

Data source: 2024 Global Filtration Market Analysis

Ro membranes Detail Display：

5-Step RO Membrane Replacement Guide

1. Shut Down & Depressurize
   • Close feed valve, unplug the system.
   • Open faucet to release residual pressure.
2. Remove Old Membrane
   • Use housing wrench to twist counterclockwise.
   • Note flow direction arrows (critical for reassembly!).
3. Prep New Membrane
   • Soak in RO water for 30 minutes. Avoid tap water—chlorine damages membranes.
4. Install & Secure
   • Align O-rings, insert with firm pressure.
   • Hand-tighten housing, then add ¼ turn with wrench.
5. Test & Flush
   • Run 2 gallons through the system before drinking.

⚠️ Critical Mistake: Installing membranes backward reduces efficiency by 70%. Always check arrows!

ro membranes Product packaging

Real-World RO Membrane Success Stories

Case 1: Bangkok Tap Water Crisis

A condo complex switched to Dow Filmtec RO membranes, reducing arsenic levels from 35 ppb to 0.5 ppb. Key move? Adding UV post-treatment to protect membranes from biofilm.

Case 2: Texas Farmhouse Solution

A family using well water paired 3013 RO membrane with a iron removal filter. Result? Iron content dropped from 6 ppm to 0.1 ppm, saving $1,200/year on bottled water.

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Future Trends: Smarter, Greener RO Tech

While traditional RO membranes dominate, breakthroughs are coming. LG’s new graphene-coated membranes (2026 prototype) cut energy use by 40%.

But don’t rush to upgrade. As we saw in a 2025 test, older RO membrane outperformed “eco” versions in removing PFAS chemicals. Sometimes, proven tech beats hype.