Thanks for the replay, but seems I'm really dumb. As I read what you wrote I seemd to be confused. - -PART OF YOUR ANSWER - -connect a hose to the boiler drain on the hot water heater and lead it out of the house, then turn on or open the valve. this will be the lowest connection in the house for the hot water supply and will drain by gravity. take the air compressor connection and connect it at the highest hot water out let in the house and open it up. any remaining water in the hot water supply will be forced out at the hot water heater connection's boiler drain and will be blown out of it and the lines.
My Question: I only have to open 1 hot water outlet - -The highest one and leave the rest closed????? Then do the same to the cold side???
then ALL of the HOT & COLD water will be flushed out???
I hate having to ask so may questions, but this being the first time I've done this - -I hate to make a mistake and find a broken pipe or something else on my return. I am going to have soneone monitor the house at least once a week. I'm sort of a worry wort. Tahnks for all the help so far you have been a positive place to get help for the uneducated.
