The o-ring 7170327 fits on the drain hose adaptor of many standard sized water softener systems. This o-ring fits on many of the Kenmore, GE, Whirlpool, Morton, Northstar, EcoWater and other systems. The GE part # is WS03X10021 and 900041 is an additional older part number.
This o-ring fits Drain Hose Adaptor #7024160