Harmsco (HB-20-1W) 20"X4.5" Big Blue "Calypso Blue" Pleated Sediment 1 Micron Filter 20 inch x 4.5 inch Big Blue Filters2047 4% stabilized rejection against 32

4% stabilized rejection against 32

Monitor TDS levels with a meter to track resin depletion and replacement timing

📏 4" × 21" Dimensions

and chemical applications where corrosion resistance is critical

the WS-10 will treat approximately 75 gallons before needing replacement

Harmsco (HB-20-1W) 20"X4.5" Big Blue "Calypso Blue" Pleated Sediment 1 Micron Filter 20 inch x 4.5 inch Big Blue Filters2047 4% stabilized rejection against 32The Harmsco HB 20 1W delivers professional grade sediment filtration with pleated polyester media engineered for high dirt holding capacity and extended service life. This 20"x4. 5" Calypso Blue cartridge captures particles down to 1 micron and can be cleaned and reused in most residential and commercial applications. SPECIFICATIONS Harmsco HB 20 1W Technical Details Model Number HB 20 1W Dimensions 20" x 4. 5" (Big Blue) Micron Rating 1 Micron Filter