Fresh water tank

[Ctopher61]

Hey everyone, long time Montana owner, currently have a 2017 3791RD and i love it. So, getting ready for a get away, first time camping with no hookups. Generator is good to go, I have never used the fresh water tank, and I bought this unit in October of 2016. So I decided to sanitize it today, followed all the directions, everything was working good.....then third flush of the tank the pressure started to drop way off. Mind you now I am a full timer and so everything was working great before I did this while on city water. So I checked all the screens at all the outlets, nothing there. I took the pump apart and inspected it, nothing there. It appears to me that the pump is sucking on the tygon line from the fresh water tank and collapsing it, which must mean a blockage, right?Does anyone have any pointers/experience you can throw my way?
Thanks in Advance.

PS when hooked back up to city water everything is fine while hooked up this way.

[jimcol]

Won't fix the problem but to verify it is blockage fire up your compressor and blow from the pump back to the fresh water tank. If that clears the blockage I'd try draining the tank several times to see if you can get whatever is blocking the flow out of the tank.

[mfreitas]

Maybe off the wall but look at the vent on outside of trailer. Maybe plugged somehow.