Dishwasher Water Feed Tube Guide Casing. This water feed tube guide casing (part number WD01X10306) is for dishwashers.Water feed tube guide casing WD01X10306 helps holds the water feed tube to the upper spray arm manifold.Unplug the dishwasher or shut off the house circuit breaker before i... - Dishwasher Water Feed Tube Guide Casing.