Robertshaw Washing Machine Water Inlet Solenoid Valve Whirlpool; part number CW-551.  Replacement for numbers 461970201551, 8181694, AP3128776, AP6011714, PS11744913, PS391478 and  WP8181694.  Designed to fit specific Whirlpool manufactured washing machine models including Kitchenaid, Roper and Kenmore. Robertshaw is the OEM manufacture for Whirlpool on this item. You are getting an OEM part direct from the source.