JAYCO TOWABLE SECTION 8 – PLUMBING SYSTEM
8-15
7. Attach a blowout plug (as shown) to the City Water Inlet on
the outside of the RV. Refer to Fresh Water Connections
section.
8. Attach the air hose to the blowout plug. Set compressor to
30 PSI.
9. Fresh water tank drain should be open.
NOTE: if your RV is equipped with a water tank shutoff
valve (located near the water pump) this valve should be
opened to allow air to blow into the water tank (refer to
Water Heater Bypass section).
10. Blow air into the water lines through the blowout plug and
the City Water Inlet to evacuate all water from the lines.
Air should only be blown into the water tank for 30 to 60
seconds, to avoid pressurizing the tank then turn the water
tank shutoff valve OFF. Continue blowing out the water
lines which can take 5 to 10 minutes.
11. Pour one cup of RV antifreeze in all the drain P-traps (sinks
& bathtub).
12. After RV water lines have been blown out, remove the air hose and the blowout
plug from the City Water Inlet.
Winterize the Black Tank Flush (If So Equipped):
1. Connect the blowout plug to the Black Tank Flush inlet on the outside of the RV.
2. Connect the air hose to the blowout plug. Set the compressor to 30 PSI maximum.
3. Make sure the black tank has been emptied. Open the black tank drain valve.
4. Blow air into the flush inlet for 30 to 60 seconds.
5. Disconnect the compressor and blowout plug.
6. Close the black tank drain.
Winterizing with Antifreeze Method:
It may be easier to winterize the RV with another person to assist you.
NOTE: Antifreeze should never enter the water heater, RV water filter, refrigerator,
refrigerator water filter, or fresh water tank.
1. Turn water heater power OFF. Turn water heater gas valve (if so equipped) OFF
(outside of the RV).
2. Water heater bypass should be ON. Close valves A and B on the water heater, valve
C should be open. Refer to Water Heater Bypass Diagram. Water is prevented from
entering the water heater.
3. Level the RV and drain the fresh water plumbing system. See Draining the Fresh
Water System.
4. Water heater should be empty after performing Step 2. Water heater bypass should
still be ON (if so equipped). See Water Heater Bypass Diagram.
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