Watts (FM-BB-20-1) 20"X4.5" Big Blue Pleated 1 Micron Sediment Filter TPTZ Method (100 Tests) The larger-diameter outer layer functions

The larger-diameter outer layer functions as a depth pre-filter

The single-junction design makes it well-suited for tap water

0 GPM Connection Size 3/8" Female Pipe Thread (FPT) Material Injection Molded Polysulfone Configuration Inline (IL) Mount Scale Type Dual Scale Display Adapter Style Quick Loc (1/2" Union) Chemical Resistance High (Polysulfone Construction)

and conditioning systems

Material & Construction Specifications

Watts (FM-BB-20-1) 20"X4.5" Big Blue Pleated 1 Micron Sediment Filter TPTZ Method (100 Tests) The larger-diameter outer layer functionsThe Watts FM BB 20 1 is a 20"x4. 5" pleated sediment filter engineered for whole house applications where fine sediment removal at 1 micron is critical. Built with color coded Plastisol end caps and cleanable pleated polyester media, this Big Blue cartridge delivers reliable performance without surface blinding or flow reduction. SPECIFICATIONS Watts FM BB 20 1 Core Specs Dimensions 20" x 4. 5" Big Blue standard Micron Rating 1 Micron Fine sediment