Here are the basic we have listed in the owners manual ...
Winterizing the Hot Water / Outdoor Shower System:
To reduce the possibility of fractures and splits in the system's water tanks, lines, and pressurizing pump in climates where the temperature is below freezing (32 degrees F; 0 degrees C), it is recommended that as much water as possible be drained from the system, or you can add a mixture of water and non-toxic antifreeze to the campers water system (Please contact the companies at the bottom of this page for more info regarding non-toxic antifreeze, mixture ratio, and important safety info). If your camper is equipped with the “Hot Water Heater”, it is NOT recommended that you use anti-freeze in the campers water system unless you remove the anode rod and replace it with a ¾” drain plug.
* CAUTION – BE SURE TO RELEASE THE WATER PRESSURE
IN THE HOT WATER TANK BEFORE YOU REMOVE THE ANODE ROD !
1. Drain the Hot Water Tank:
Drain the Hot Water Heater 3 or 4 Gallon Hot Water Tank by removing the Hot Water Tank Drain Plug (Anode Rod). This plug is located on the center of the bottom of the hot water tank in the Hot Water Heater Compartment. It is accessed by removing the Hot Water Heater Access Panel on the exterior wall. Remove the Hot Water Tank Drain Plug (Anode Rod). After water stops flowing from the Hot Water Tank Drain Plug Port, replace the drain plug.
When you remove the drain plug from your water heater, you will see an anode rod attached to it. The anode will probably look corroded and eaten away, but that’s the purpose it serves so don’t worry about that. Annually, or when the rod has eroded away to about a quarter of its original size, replace it. Simply unscrew the drain plug and screw in a new one.
Suburban water heaters feature an anode rod. The anode equalizes aggressive water action, providing cathodic protection for the tank. It is a very important factor in tank life and should only be removed for inspection, draining or replacement. It is removable using a 1-1/16" socket.
All Suburban water heaters are protected by a magnesium or aluminum anode to prolong the life of the tank. Under normal use, the anode rod will deteriorate. Because of this, we recommend it be replaced annually or when consumption or weight loss of the rod is greater than 75%. Note: Water with high levels of iron and/or sulfate will increase the rate of deterioration. To extend anode life, drain water from tank whenever the RV is not being used. Avoid any extended time of non-use with water in the tank.
* IMPORTANT HOT WATER TANK NOTES
Drain the water heater completely, particularly if you are introducing antifreeze into the plumbing system. Antifreeze can be very corrosive to the anode rod inside of the hot water heater. The result will be accelerated deterioration of the rod and heavy sediment in the tank. If you intend to winterize by adding antifreeze into the system, remove the anode rod from the tank (storing it for the winter) and replace it with a 3/4" drain plug.
2. Drain the Shower Head and Hose:
Open the door to the Outdoor Hot Water Shower Compartment near the rear of the camper on the driver's side. Remove the shower head and hose. Extend the hose until it is straight. With the hose straightened, position the showerhead so that it is lower than where the hose is attached to the shower compartment. Turn on both the cold and hot water valves until the water stops flowing from the showerhead. Close the water valves.
3. Drain the 20 Gallon Freshwater Tank and Drain Line:
The 20 Gallon Freshwater Reservoir, located under the camper's front seat, and its drain line are drained at the drain valve located on the driver's side rear exterior wall near the camper entry door, open the valve and leave it open.
4. Drain the Water Pump:
Run the Water Pump for approximately 15 to 30 seconds or as long as water is flowing from the sink faucet with both the hot and cold water valves opened to drain as much remaining water from the system as possible. Turn the water pump off, and leave both water valves open so that any excess water that might freeze, will have room for expansion (instead of cracking a water line).
5. Add Non-Toxic Antifreeze
Add the correct amount of properly prepared non-toxic RV Antifreeze and water solution to the Freshwater Reservoir at the Potable Water Port on the driver's side of the camper. See antifreeze manufacturer's mixture recommendations.
Run the system water pump until antifreeze/water mixture flows from the sink faucet and showerhead. Close all valves.
Stow the showerhead and hose to the Outdoor Hot Water Shower Compartment.
Drain the sink and replace the cap on the sink's gray water spout.
Before refilling the camper's 20 Gallon Freshwater System and 3 Gallon Hot Water Tank with fresh/potable water, thoroughly flush the entire system with the pressurizing pump running, to remove the antifreeze.
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