I use air to blow out my lines every year but that won’t get the water out of the water pump. You need to run antifreeze thru the pump to prevent it from freezing. Pour antifreeze in each sink and shower, a little extra to get some in the grey tank. Pour some more antifreeze in the toilet to get some in the black tank. If you have an outside shower don’t forget to blow it out also. Two gallons is usually plenty for everything. If you’re not sure use a little more, antifreeze is cheap insurance to prevent damage to your coach!!!
__________________
|