[BB_TX]

Several years ago the first time out in the spring, I used the black tank flush .... and flooded the inside of the trailer. I found the anti siphon valve nipple broken off and the body cracked. Only thing I can think of that would have done that is freezing. Apparently I did not run antifreeze thru it that year. See pic below. Zoom in and see cracks in the body of the valve.


I completely removed the valve and tied the lines back together and now use an external anti siphon valve. In the second pic you can see after the valve was removed and also see the pink stuff in the lines after I had winterized it.