Harmsco (HB-20-1W) 20"X4.5" Big Blue "Calypso Blue" Pleated Sediment 1 Micron Filter Pentek (WP5BB20P) 20"x4.5" Polypropylene String Wound 5 Micron Sediment Filter while excessive pressure prevents the

while excessive pressure prevents the tank from filling properly

Replace UV lamp #20 annually regardless of visual appearance

The Harmsco HB-20-20W fits all standard 20 inch Big Blue filter housings with 4

Engineered flow channels maintain low pressure drop while delivering 5 micron filtration and full chemical adsorption capacity throughout filter life

ensuring secure

Harmsco (HB-20-1W) 20"X4.5" Big Blue "Calypso Blue" Pleated Sediment 1 Micron Filter Pentek (WP5BB20P) 20"x4.5" Polypropylene String Wound 5 Micron Sediment Filter while excessive pressure prevents theThe 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