[team bradfield]

where we camp there are no water hookups, we only camp there on weekends, i usually take a couple 6 gallon water jugs along to add water if an additional shower is taken or we go for a long weekend. Problem our rig does not have the old style fill port, we have a single hose connection with a tank fill or city switch. Is it possible to make a hose/funnel combo and put switch to tank fill and fill this way, or is there a check valve that needs pressure to open the valve?