Description
The 20″ Big Blue String Wound 1 Micron Sediment Filter is a robust, high-capacity cartridge designed to remove fine particulate matter such as silt, sand, rust, dirt, and suspended solids as small as 1 micron. Its deep string-wound construction provides excellent dirt-holding capacity and extended life, making it a dependable choice for whole-home filtration systems and high-flow applications.
This filter helps protect downstream equipment like carbon filters, softeners, UV disinfection units, and reverse osmosis systems — ensuring cleaner water at every tap.
Key Features
- 1 Micron Filtration — Captures ultra-fine sediment to enhance water clarity.
- String Wound Media — Deep wound polypropylene provides high dirt-holding capacity and longer service life.
- Big Blue Size (4.5″ × 20″) — Designed for high-flow residential and light commercial systems.
- Polypropylene Construction — Chemically inert and safe for potable water applications.
- Protects Downstream Equipment — Reduces premature clogging of sensitive water treatment components.
Compatibility
The 20″ Big Blue String Wound 1 Micron Sediment Filter is compatible with:
- 20″ Big Blue filter housings (4.5″ × 20″)
- Whole-home point-of-entry systems
- Pre-filtration ahead of carbon, softeners, RO, and UV systems
⚠️ Not suitable for slim-line housings (2.5″ diameter).
Specifications
Filter Size – 4.5″ × 20″ (Big Blue)
Micron Rating – 1 micron
Media Type – String wound polypropylene
Application – Fine sediment removal
Replacement Interval – Typically every 3–6 months (based on water quality)
Applications
Ideal for:
- Whole-home sediment filtration
- Well water pre-treatment
- Pre-softener protection
- Pre-carbon and pre-UV filtration
- High-flow residential and light commercial systems
By capturing very fine particles, this filter helps improve water quality and protects downstream equipment from clogging.
Maintenance & Replacement
To maintain optimal performance:
- Inspect regularly — Check the filter condition every 1–3 months.
- Replace as needed — Replace the cartridge when water flow slows or discoloration is present.
- Depressurize housing before service — Always turn off water and release pressure before opening the filter housing.
- Consider pre-filter staging — If water has heavy sediment, use a coarser pre-filter (e.g., 5–10 micron) ahead of this fine cartridge to extend life.
Routine maintenance safeguards water flow and prolongs the life of your whole-home water treatment system.
Benefits of String Wound Filters
✔ Deep sediment trapping for longer life
✔ Excellent fine particle removal
✔ Cost-effective option with strong flow performance
✔ Helps protect sensitive downstream filtration equipment
The 20″ Big Blue String Wound 1 Micron Sediment Filter is a reliable solution for homeowners and installers seeking high-capacity fine sediment removal with extended service life in whole-home applications.

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