Kitchen sink drain leaking - can't stop drip
I just bought a brand new coachmen chaparral 29bhs and on the very first trip I noticed the drain on the kitchen sink was leaking. It is leaking at the very first joint where the ring is threaded to the bottom of the sink drain. It doesn't matter how much I have tightened or adjusted the drain pipe and re-tightened, it continues to drip. Does anyone have any ideas on how I can get that sealed up so it doesn't drip? Any ideas would be appreciated.