While packing up to go home while camping in our 2020 Heartland Bighorn I was washing out the black tank and I started to smell sewage, which I had not smelled before. I began to look around to find the source of the smell, when I noticed water running down the wall of my downstairs storage area. I turned off the water and began to investigate further. I noticed water running out of a PEX pipe cover so I removed it and the PEX entered the floor of my bathroom, which I was not able to access. After doing to some research I found out my problem was probably a bad anti-siphon valve. Called Heartland and was told the valve was either behind the shower handles or underneath a sink. Searched and searched to no avail. Borrowed a camera snake and low and behold the valve was installed near the bottom of the shower wall and I was unable to reach it. Called Heartland again and Damon proceeded to accuse me of trying to make another claim on a previous shower claim where the shower leaked onto the floor. He talked to me like I was some low life. Thirty-two years as a public servant and I was never spoken to in such a manner. Heartland refused to help me in anyway for their poor craftmanship if you want to call it that. Had to take out the upper wall of shower and cut hole in paneling to changed valve. Took me most of the day, but he valve is now fixed. So many problems with our Bighorn, bad inverter, electrical wired incorrectly had to have redone, shower not sealed properly when purchased, cabinet doors installed incorrectly and I can go on and on. Never buy Heartland again. Hope this post helps others with the same issue. Good luck.