Firstly thanks for reading! I did some poking around but couldnt find specific problem. I took my dishwasher apart for a major cleaning as she was all "bunged up" so I cleaned everything nicely, however when I put everything together and tested it I had excellent pressure but I cant get a good seal between the "coupler" (clear plastic snap ring to hold 3rd level arm on) and the plastic/rubber supply line elbow that brings the water in at the top of the tub. I unscrewed the arm assembley from the top of the tub and now it leaks between tub and insulation and down to the floor. Did i miss a gasket/washer that goes in threre? or can I use plumbers putty or silicone or???? any help is greatly appreciated....Thanks!