use a small shop vac to suck out all the water from the heater and the entire system. Just hook up a shop vac to a small piece of hose attached to the heater drain. You will be surprised about how much water you pull out. After that pour anti fre...
I have a 2006 Sea Ray 280 Sundancer with trailer for sale. Twin Mercruiser 5.0 engines, Alpha 3 drives, generator, heat & air, full camper enclosure, records and manuals etc., - excellent condition. Always fresh water.
