5 Micron 20” Whole House String Wound Water Filter Replacement Cartridge for Well Water Filtration

A string wound water filter cartridge serves as an essential, widely-used replacement filter that removes sediment and particles from water. This workhorse of many filtration systems effectively traps contaminants like sand, rust, and silt to protect your plumbing, appliances, and more advanced downstream filters.

How Does a String Wound Filter Work? Precision Winding for Superior Filtration
The cartridge features a sturdy polypropylene or stainless-steel core. Manufacturers tightly wind high-quality yarns—such as polypropylene, cotton, or glass fiber—around this core with great precision. This specific winding pattern and density directly control the filter’s ability to capture and hold dirt.

Key Features & Benefits: Why Choose a String Wound Filter?

• Graded Density Structure for Maximum Efficiency: The filter’s core efficiency lies in its graded density. A looser outer winding traps larger particles, while a progressively tighter inner winding captures finer sediments. This design uses the entire filter depth, prevents premature clogging, and extends service life.
• High Dirt-Holding Capacity for Longer Life: The dense, string-based construction creates a vast surface area. This structure allows the cartridge to retain a significant amount of contaminant before the pressure drop becomes too high, giving you longer service between changes and lowering your maintenance costs.
• Broad Chemical Compatibility for Versatility: Depending on the yarn material (e.g., polypropylene), these cartridges can filter a variety of liquids beyond water, including certain solvents, oils, and mild chemicals, making them a versatile choice for industrial applications.

Filtration Performance & Common Applications

String wound cartridges come in various micron ratings. They range from 1 to 100 microns. This range lets you select the perfect filtration level.

The commonly used string wound water filter cartridge are:

• Residential Water Filtration: They act as a perfect pre-filter for whole-house systems or under-sink units to protect plumbing and fixtures from sediment.
• Commercial & Hospitality Use: Restaurants, hotels, and offices use them to pre-filter tap water, improving water clarity and protecting equipment.
• Industrial Pre-Treatment: They serve as a cost-effective and essential pre-filter for Reverse Osmosis (RO) systems and UV purifiers, protecting this sensitive equipment from fouling and damage.
• Aquarium Filtration: They help maintain a clean and healthy environment for aquatic life by removing suspended particles from the water.

Replacement & Maintenance Tips for Optimal Performance

• Select the Correct Size: Always verify the cartridge length and diameter to ensure a perfect fit for your filter housing.
• Install It Properly: Follow the manufacturer’s instructions for installation to ensure a tight seal and prevent unfiltered water from bypassing the cartridge.
• Determine the Replacement Frequency: Your water quality, flow rate, and usage determine the replacement interval (generally 1 to 6 months). Replacing the cartridge regularly is critical to maintain water pressure, filtration efficiency, and prevent trapped contaminants from re-entering your water.