[VAC] Re: Backflow from demand pump

[John Anderson <janderson@xxxxxxxx>]

James, my trailer developed this problem also a year ago.  There is an angle
(check) valve on the line from the hose attachment to the cold water main in the
trailer, and it appears to have failed internally.  Do you have a similar valve?
It does not look very hard to replace; I just haven't taken the time to do it.  In
fact it may just be stuck open with a piece of mineral, and could be cleaned and
reinstalled.