The Middle Spray Arm is an OEM replacement part for GE dishwashers. It is an internal component responsible for distributing water and washing accessories to dishes located in the center rack of the dishwasher.  Symptoms of a bad middle spray arm include: Dirty dishes located in the center rack, even after a full wash cycle Noticeably reduced water pressure from the center spray nozzle  Clogged or blocked spray holes in the arm Causes of a bad middle spray arm can be normal wear and tear, mineral buildup obstructing spray outlets, or physical damage to the arm itself. This GE replacement part is also compatible with Hotpoint, RCA, and some Kenmore models.Part Number WD22X10048 (AP3868882) replaces 1168309, AH1016904, EA1016904, PS1016904.