Jeffrey M Purcellville , VA October 26, 2020 Appliance: Whirlpool Dishwasher WDTA50SAHZ0 Whirlpool Dishwasher Wdta50sahz0: Whirlpool dishwasher leaking (model wdta50sahz0). How to replace Dishwasher Spray Arm. Replaced the Arm-Spray attachment after reading some posts here on APP and that fixed the problem. I initially replaced the main seal and the bottom seal but that didn't fix the leak. 16 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes