Double check possible open taps: outdoor shower, low point drains, indoor shower and make sure your pump lever is fully turned from the side position where you pumped in the pink stuff, to in line with the main pipe. IF you disconnected the pump itself, double check those connections and make sure they are secure with no leaks (our manual says to do disconnect the pump if you are blowing air through and NOT filling with pink stuff). Make sure all but the tap you are drawing from is closed. We get a lot of spitting and sputtering the first time out, sometimes for days but we don't normally run a lot of water through.
I like to pull clear water through to the kitchen sink first as it is farthest from the hook up, then the other water outlets in line. I do this cleanse of pink stuff PRIOR to connecting the hot water tank back in.
As a side note, we camped last weekend and took a fully winterized rig to the site. We didn't cleanse all lines and I noticed that after we were running clear water through, the toilet sprayer hose (an add on) was no longer pink and we occasionally got pink stuff out the previously clear taps. I figure the pink stuff is heavier than clear water so it gradually settles back into our lines from the sprayers, outdoor shower, etc. We had clear water in kitchen and bath and then a bit of pink, then clear, then pink and so on. We normally do the full flush of all taps right off but John thought he might be able to leave pink stuff in some of the lines that we weren't using. Didn't work. It drops down and mixes in.
If you are worried about freezing, you can see a good portion of your water lines to check. They pretty much run the perimeter of your rig and you can see them under the cabinets, sinks, etc. Phoenix puts all water lines on the inside of the walls and floor so they are in the heated space. The at-risk spots are hot water tank (which you drained so no worries) and the outdoor shower, which should have pink stuff in it. Oh, and the pump and valves on the macerator. We learned to pump a bit of pink stuff through there also.
I hope you find the solution quickly. Please post so the rest of us can learn.
Good luck!
