Glad to hear your success.
BUTTT I have similar Leakage from the top of black tank. That is where the similarity ends. I have 38PS3 or this area is the same as the Dallas. The stair-way is the center of the RV, Stool and washer-drier being on the door side. The washer water and waste in my travels over the black tank. We are testing for leaks now by running the washer.
Clay
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