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Help Center4.5x20 Inch Big Blue Water Treatment Pre-Filter 20 Micron 1" NPT Heavy Duty
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As a leading manufacturer with over 25 years of experience, Anping County Boli Hardware Wiremesh Products Factory proudly presents our 4.5x20 Inch Big Blue Water Treatment Pre-Filter 20 Micron 1" NPT Heavy Duty — a robust solution designed for demanding water filtration applications. Our factory, established in 1998, combines precision engineering with durable materials to deliver a pre-filter that effectively removes sediment, sand, rust, and other particles down to 20 microns. This heavy-duty unit is built to withstand continuous operation in both residential and commercial settings, ensuring reliable water clarity and protection for downstream equipment.
The product features a standard 1" NPT connection for easy integration into existing plumbing systems, and its 4.5-inch diameter by 20-inch length provides high dirt-holding capacity and long service life. Whether you need a point-of-entry whole house filter or a pre-treatment for industrial water systems, this Big Blue filter delivers consistent performance.
Key Features & Technical Specifications
- Premium Filtration Precision: 20-micron rating captures coarse sediments, sand, silt, and rust particles, protecting downstream equipment like water softeners, RO systems, and irrigation controllers.
- Heavy-Duty Construction: Manufactured with high-impact polypropylene housing and reinforced threads, rated for continuous operation at up to 125 psi and 125°F (52°C).
- High Flow Capacity: The large 4.5x20 inch size allows for higher flow rates (up to 40 GPM for whole house use) with minimal pressure drop.
- Standard 1" NPT Connections: Compatible with most plumbing systems — easy to install with standard pipe fittings.
- Long Service Life: Replaceable filter cartridges (not included in housing) are widely available; the housing itself is reusable and durable.
- Versatile Applications: Ideal for residential, commercial, agricultural, and industrial water treatment, including well water, municipal water, and process water.
- Optional Customization: Available in different colors, with or without pressure gauges, and with various inlet/outlet configurations upon request.
| Parameter | Specification |
| Housing Dimensions | 4.5" diameter x 20" length |
| Connection Size | 1" NPT female |
| Micron Rating | 20 microns |
| Max Operating Pressure | 125 psi (higher available on request) |
| Max Operating Temperature | 125°F / 52°C |
| Housing Material | High-impact polypropylene (PP) or optional reinforced plastic |
| Color | Blue (standard); other colors customizable |
Advantages for Your Business
By choosing our 4.5x20 Big Blue Pre-Filter, you invest in a reliable first line of defense against sediment. The heavy-duty design reduces maintenance frequency for downstream filters, prolongs the life of water heaters and appliances, and improves overall water quality. Our factory-controlled production ensures consistent quality batch after batch, with optional OEM/ODM services to meet your branding requirements.
With an annual export value exceeding US$5 million and a global customer base spanning North America, South America, Europe, Asia, Africa, and Oceania, we have the expertise to deliver products that meet diverse international standards. Our shipping ports (Tianjin, Qingdao, Shanghai, Foshan) provide flexible logistics solutions for bulk orders.
Trust the manufacturer that combines three decades of wire mesh and filtration experience with a commitment to quality. Contact us today for competitive pricing, customization options, and fast delivery. We are ready to support your water treatment projects with premium pre-filters that perform.
Frequently Asked Questions
- What is the micron rating and why is it important? This filter uses a 20 micron pleated or melt-blown cartridge (depending on configuration) to remove sediment down to 20 microns. It is ideal for pre-filtration to protect finer filters and equipment.
- Does the housing come with a filter cartridge? The housing is sold separately; cartridges are available in various materials (polypropylene, polyester, etc.) and can be ordered together. Please inquire for bundled options.
- Can this filter be used for hot water? Maximum temperature is 125°F (52°C). For higher temperatures, please request a specialized housing.
- What is the maximum flow rate? At typical residential pressure, the housing can handle up to 40 GPM for whole house use. Actual flow depends on cartridge type and pressure.
- Is the housing compatible with standard 4.5x20 cartridges? Yes, it accepts all standard 4.5" x 20" cartridges with 1" NPT connections.
- Can I customize the color or add a pressure gauge? Yes, we offer customization options including color, labeling, and additional ports for gauges or drain valves. Minimum order quantities may apply.
- What materials are used in construction? The housing is made of high-impact polypropylene, which is corrosion-resistant and food-grade safe. Seals are EPDM or Buna-N (optional).
- How do I install this pre-filter? Installation is straightforward: shut off water, cut into the main line, connect to 1" NPT fittings, and secure. Detailed instructions are provided with each unit.
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