Harmsco (HB-20-1W) 20"X4.5" Big Blue "Calypso Blue" Pleated Sediment 1 Micron Filter Autotrol 255 Control Valve (1001670) 1" Sweat Copper Tube Adapter Kit Replacement schedule depends on feed

Replacement schedule depends on feed water chemistry

Check brine assembly

This open-cartridge design means you're not locked into proprietary filters

Check differential pressure

The electronic lamp indicator alerts you when the UV lamp requires replacement

Harmsco (HB-20-1W) 20"X4.5" Big Blue "Calypso Blue" Pleated Sediment 1 Micron Filter Autotrol 255 Control Valve (1001670) 1" Sweat Copper Tube Adapter Kit Replacement schedule depends on feedThe 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