This is the fresh water tank drain, do not forget to open it during the winterizing procedure this fall/winter to empty any fresh water that might be left over! Low point drains for the rest of plumbing are typically red and blue plex tubing on other side of tt. My are below the hot water heater.
Marriot2 on Wheels 2017 Flagstaff Classic 832 OKBS
2013 GMC Denali 6.6L 2500 HD DMAX w\Alison Trans
Pepper Pomeranian rescue 101 days as camping buddy
Days camped in FR, 2011 = 20, 2012 = 57, 2013 = 59
... 2014 = 39, 2015 = 52, 2016 = 68, 3 more planned