Recently i bought a pop up camper from a friend whose husband had passed. she needed to get out from under the payments and I wanted a small camper for weekend trips to the lease.
My wife and I have used the camper 3 times, each time I filled up the water tank. the first 2 trips the water tasted fine but this past weekend the water tasted like plastic. I drain the water out after each trip and have ran some through to rinse it out each time.
any ideas why we would be getting the plastic taste on one trip and not the others?

thanks, Eddie