Adaptor leaking due to old rubber washer

Turned off water. Took cardboard backing off lower back of unit. Unscrewed the old adaptor from the water distributor. Unscrewed the water hose connection from the adaptor. Put plumbers tape on new adaptor. Re-connected water hose to new adaptor and re-attached the adaptor to the water distributor. Turned water on, checked for leaks, and tightened adaptor to water distributor until leak stopped (approximately a quarter turn) after hand tightening. Easy, hardest part was pulling out the unit and putting it back in place!