gbopp wrote:
Another option is to use compressed air to blow out the lines if you're getting freezing weather. It's quick, cheap and effective.
You still need the pink stuff for the traps, etc..
Living here in North Carolina this is what I do. "Red neck" winterizing
Works for several days of freezing temps.
Drain fresh water tank
Dump grey and black tanks
Drain hot water heater. Make sure electric element is off
Blow out water lines thru city water connection with air compressor set at 45 psi
Open each faucet one at a time and don't forget outside kitchen if u have plus toilet
Low point drains last
Pour pink stuff in grey and black tanks filling p traps and extra to reach gray and black tank valves.