How do I soundly drain my hose down heating system? ...

I Have a gravity nurture paint sprayer what...
Answers:    turn off the electric and/or gas. close your cold wet valve and start on a hot water faucet so that it will allow the container to vent so it can drain faster.
Do i own a plumbing problem?
Shut off the gas and hang about 12 to 24 hours for the water to cool down. Connect garden hose to drain stopcock at the bottom. Run the hose as far as it will go. start on the valve.