leak at connection to drain pipes and Holding tank

SJ-Chris wrote:
"There are different types of leaks and they have different levels of severity..."


I filled the sink to the top 3 times then pulled the sink plug and no leak. Before anytime a sink was draining a little water would leak


Thanks to everybody for all your help and advice, Thank God I didn't have to drop the tank or pull out the camper shower to rework the plumbing beneath
Chris