View Single Post
Old 02-17-2017, 03:55 PM   #3
PackerFan
Montana Master
 
Join Date: Feb 2004
Location: Pahrump
Posts: 2,523
M.O.C. #1081
That is your Black Tank Flush - Back Flow Preventer Valve.

Sometimes they might leak a little. I removed mine and connected the two pipes together.
PackerFan is offline   Reply With Quote