Whirlpool Refrigerator Inline Water Filter (replaces 18001001, 4378411P, 4378411RP, 46004210508, R0183114) 4378411RB

This inline water filter (part number 4378411RB) has NSF certification 42; it reduces chlorine taste and odor and class III particulates rust, dirt, sand and sediment 5 to 15 microns in size.

Inline water filter 4378411RB is for refrigerators without a built-in water filter. The filter quickly connects directly to your refrigerator's water supply line.

Replace every 6 months, or more often if water flow slows noticeably.

Shut off the water supply before installing this part.