Glen I got looked at your floor plan and very similar to my 38PS3. Do you have washer-drier or was your RV plumbed for a washer-drier? I had a connection leak at a water shut-off valve that followed the pipe down missing the floor. The small leak ran down the Plex pipe missing the floor but came off at pipe support which meant the drip came off before going over the Black Tank.
Happy Hunting
Clay
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