It's not difficult, just take it one step at a time. First, remove your dinette seat covers. Then remove the panels that are screwed down under the seat (2 screws for each panel). In the seat nearest the fridge, you will see the water pump. Make sure valve E is closed and D is open (refer to the manual page 8-5). The only time you will ever switch these is to add RV antifreeze in the fall. Next, under the other seat you will see the water lines for the heater bypass. The lines are white color so you should be able to see how the pink bypasses the heater. Don't touch these yet. Next step is to flush out the pink. You can add water to the fresh tank or use the city connection, either will work. Assuming you use the fresh water tank, fill it only maybe a 1/3 full, you don't need much to flush out the lines. Turn on the pump and go to the first faucet, say the kitchen sink. Turn on the cold, let it run until you see no more pink, then shut it off and turn on the hot and do the same. Do this for each faucet - bath sink, bath shower, and outside shower. Once you've done this you should look at the water lines by the bypass valve and see no pink in the lines. At this point the pink is gone and you now have fresh water in the water lines. The pink is not toxic so not a big deal anyway. Next, you should sanitize the fresh water tank, hot water heater, and water lines. To do this, first drain all of the water from the tank. Then turn the water heater bypass valves to "summer" position. Then follow the sanitizing instructions on page 8-10 in the manual, it's pretty straight-forward. When draining the bleach-water from the RV, dont forget to drain the water heater too. You might need to fill/drain twice to get the bleach smell out. Also, the 17Z has 28.5 gal of fresh water including the 6 gal heater, so I use 1/2 cup of bleach. Seems to work fine, no problems after 4 years.