Reliable filtration, built for everyday home use
Hydrana polypropylene string-wound sediment filters capture dirt, sand, rust, and other suspended particles from your water supply — protecting your faucets, showers, appliances, and any filters that come after them.
Each cartridge is made by winding quality polypropylene yarn around a core, building the depth filtration that makes string-wound cartridges a whole-house workhorse. Every Hydrana cartridge is made to order in your size and micron rating.
Sizes & prices
- 10" x 2.5" (standard housing) — $5.20
- 10" x 4.5" (Big Blue housing) — $11.20
- 20" x 2.5" (standard housing) — $11.50
- 20" x 4.5" (Big Blue housing) — $20.99
Every size is available in 1, 5, 10, 20, 30, 50, and 100 micron ratings.
Which micron do I need?
Match the cartridge you are replacing, or use this guide: 50–100 micron for coarse well sediment, 20–30 for everyday whole-house use, 5–10 for fine dirt and rust, 1 micron for the finest filtration. Full guide: Find Your Fit.
Want added antimicrobial protection on the cartridge? See our antimicrobial string-wound filters.
String-wound vs pleated vs melt-blown sediment filters
Homeowners comparing sediment cartridges meet three constructions. String-wound cartridges wind yarn in a graded pattern — coarser outside, finer at the core — so sediment is captured through the full depth and dirt-holding is high; they are a strong choice for well water with sand, rust and mixed particle sizes. Pleated cartridges fold media for maximum surface area and flow, load on the surface, cost more, and at coarser ratings can sometimes be rinsed and reused. Melt-blown (spun polypropylene) cartridges are economical depth filters that perform well at fine micron ratings but can load faster on very dirty water. There is no single winner: match the construction to your sediment load, then match micron and size. Read the full comparison: String-Wound vs Pleated vs Melt-Blown Sediment Filters.
Choosing your micron and changing on time
Start coarse on dirty water (50–100 micron for grit), use 20–30 micron for general sediment, 5–10 micron for finer dirt and rust, and 1 micron only as a final stage. Replace every 3 to 6 months, sooner at a 10–20 PSI pressure drop. Shop the range in String-Wound Filters or get sized in the Filter Guide.