Originally Posted by beerman47
is pin weight reduced if you run with fresh water tank full...
Where is your tank located?
If it's behind the trailer axles, (which most aren't), yes it will reduce pin weight.
If it's in front of trailer axles, (which most are), no, it will increase pin weight. By how much is determined by exactly where between the trailer axles and the pin it's placed.
Mine is approx. half way between the two and adds 400#'s to my pin weight when full. 100gal tank.