of the end wall 44 b in the three other positions the channel 68 substantially vertically aligns with the outlets 50 52 54 respectively appropriate positioning or rotation of the disc 38 provides communication through the channel 68 between the inlet 48 and any one of the outlets 50 52 54 a spring washer 70 interposes the sleeve 38 a and flange 46 a the spring washer 70 biases the disc 38 against the o rings 62 to substantially avoid leakage while providing sufficient u201c play u201d to allow rotation of the disc 38 the motor means 40 under control of the logic 26 selectively rotates the disc 38 to one of its four operational positions as the washing machine 12 is advanced through its operational cycle in this preferred embodiment the motor means 40 is a conventional stepper motor 72 having a shaft 72 a the motor 72 is below the valve 36 and the shaft 72 a extends substantially vertically through the motor aperture 56 of the spool 46 to engage the mounting aperture 66 of the disc 38 the shaft 72 a is conventionally attached to the sleeve 38 a and both apertures 56 66 are conventionally sealed to avoid leakage around the shaft 72 a preferably the mounting aperture 66 and shaft 72 a define a keyed arrangement to facilitate attachment and rotation a less expensive gear motor 74 could be used as an alternative to the stepper motor 72 in this alternative embodiment shown in fig4 accurate positioning of the channel 68 with.