OK, This just hit home with me.
I have a 2014 Hemisphere 327 res, I had this same issue. While it was in for maint. I had the dealer look at it, he said it was a big job to fix it at the tank so he did the same as everyone else, put a valve on it and routed to the side so no crawling under the trailer to open/close.
Well, stupid me? The drain valve is oriented across the valve, 90* to the hose but the vent valve they put on is opposite, I found out the hard way. While filling the tank for the first time since, I heard that awful "bang".
I'm not seeing any water leaking from under the trailer but the pump isn't pumping any water out of the tank either, my guess is that I blew the pump hose off the tank
Since it's an enclosed underbelly, I have no idea where to start looking for the pump hose outlet. I can clearly see the vent and drain but, Does anyone know where the best position is to start "operating" on it is?
Is there a diagram of the tank layout available somewhere. We have a trip out this Wednesday and I have to use the FW tank.
Great way to start the season