winterizing with compressed air

I also blow out the lines first to get rid of as much water as I can first and then pump in the pink stuff using the tank pump to pump in the antifreeze and never had any problem with broken lines. also out motorhome has all copper lines in it and most have no way to get to it something where to break or it would be a real PITA to get at. So for the cost of antifreeze its a real piece of mind not having to deal with leaks in the spring. Last year I had to break out the shelf under the bathroom sink to get to a water leak on the mother in laws motorhome, was no fun trying to work in such a confined space.