Simpson ENDURO 501 551 701 751 801. Top Loader Washing Machine. The item “Genuine Simpson ENDURO 551 Washing Machine Water Drain Pump 36S551 36S551J01″ is in sale since Thursday, March 19, 2020. This item is in the category “Home Appliances\Washers & Dryers\Washer & Dryer Parts”. The seller is “spare.parts.in.da.house” and is located in Mount Druitt, New South Wales. This item can be shipped worldwide.