WATER SYSTEMS
85THOR MOTOR COACH | MADE TO FIT
9
Preparing for colder weather or storage is very important. e motorhome should be
winterized at the end of the camping season, or when exposed to temperatures that will fall
at or below 32°F (0°C). Repairs due to freezing are not covered by warranty. Add only RV
antifreeze to the fresh water system to ensure freeze protection. It may be easier to winterize
the motorhome with another person assisting you.
1. Level the motorhome and drain the fresh water plumbing system.
2. Remove or by-pass your potable (drinking) water lter (if so equipped).
3. Disconnect and cap (or by-pass) your refrigerator ice maker inlet water line (if so equipped).
4. Disconnect and cap (or by-pass) your dishwasher inlet line (if so equipped).
5. Disconnect and cap (or by-pass) your washer inlet line (if so equipped).
6. If you have a dishwasher, ice maker, or washer follow the appropriate appliance
manufacturer’s instructions pertaining to winterization (and de-winterization).
7. Turn OFF both the 12 volt gas and 120 volt electric water heater switches on the monitor panel.
8. Turn OFF the gas valve at the water heater or shut the tankless water heater switch OFF.
9. Turn the water heater bypass valves (if so equipped) to the BYPASS position. (A tankless
water heater may not have bypass valves).
10. Move the valves to the WINTERIZE position, as shown on your water system label.
11. Close the low point drains.
12. Attach a hose to the city water ll and insert the other end of the hose into a gallon
container of RV antifreeze (this quantity should be enough to winterize the motorhome).
To assist the siphoning process, put the container on a surface approximately two feet
above ground level.
13. Turn the water pump ON. If the water pump fails to self-prime, temporarily open the low
point drains. Close the low point drains as soon as the water pump primes (RV antifreeze
will begin draining out), and before continuing to the next step.
14. Open the hot water side on all faucets (kitchen, lavatory, shower, and exterior shower)
until RV antifreeze begins to ow continuously.
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