I had a truck camper for many years and blew the water out of the piping using a compressor at ~40psi hooked to the city water hookup. Sequentially open all the faucets multiple times until just air came out. Drained the water heater. Drained the fresh tank. NEVER had any problems and was nice not to have to use the pink stuff. It was stored outside in Colorado.
Do Scamps have a water drain plug at the low points like my camper did? I'm really asking for anyone with experience winterizing a Scamp with a compressor and had success. I know the pink stuff can work but would like to avoid. Also, the Scamp will be in my garage during the winter and it doesn't freeze in there, but we might winter dry camp.
Bit of an older post, but since you didn't get an answer on this I can chime in. I blow my 13 out the same way, i open the sink and get all the water out, on the other side you have the pump. What i have done is blow out through the pump first to make sure there is no water left in it, then blow out through the faucet and lastly disconnect the output of the pump and blow out again so any water stuck between faucet and pump gets out. I've done it 2 years this way and had no issues.
Thanks! I plan on figuring it out to avoid the pink stuff, plus it will be stored in the garage which doesn't freeze; I've kept a plastic jug in the garage over the years to see if it freezes).