Winterizing Plumbing
FRESH WATER SYSTEM1. Drain the water tanks completely.2. Drain water heater - remove both the inlet and outlet hoses to be sure to get all the water out.3. Connect water heater inlet and outlet hoses together.4. Add non-toxic anitfreeze ("the pink stuff") and pump that through the system until all outlets--hot and cold in the galley, head, shower, and any deck wash run only antifreeze. Leave all the faucets open to make sure there is no pressure on the system. SANITATION SYSTEM1. Pump holding tank out, then rinse thoroughly by completely filling with fresh water and 1 gallon of white vinegar twice.2. Close inlet through-hull, disconnect inlet hose and stick it in a gallon of non-toxic ("the pink stuff") antifreeze. Pump the whole gallon through the system into the holding tank. Do not reconnect head intake hose to the through-hull.3. Pump the head 50 times to get as much fluid out of the system as possible.4. After the boat comes out of the water, open all the sea cocks to drain any trapped water.