If your old part carries any of these, this is the one you want.
14200105
18001001
18001001A
4210359
4210508
4210573
4378411
4378411P
4378411RP
4378442
8004
R0183114
Whirlpool 4378411RB is a water filter. New, genuine Whirlpool OEM — ordered from the brand's own distributor, not an aftermarket copy.
Read the number off your old part
Look for the number stamped or printed on the part itself. If it says 4378411RB, or any of the 12 older numbers listed under Compatible parts below, this is the replacement. Every one of them is discontinued and every one leads here.
Shipping box
Weight and size of the parcel as it ships: 0.70 lb · 11.1, 2.09, 2.36 in. These are the carton, not the part — do not measure your old part against them.
Buying from us
One year warranty, backed by FIXIT PARTS — if it fails in the first year we replace it.
30 day returns — unused and uninstalled, in the original box.
Ships the same business day on orders placed before 12:00 PM Pacific.
