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WINTERIZING YOUR POTABLE WATER
TO WINTERIZE YOUR POTABLE WATER SYSTEM:
As a reminder, the OP15 is not a 4-season camper and as such should not be subjected to freezing temps
without after-market heating pads/ insulation kits added (something we do not offer as an option).
Please follow the instructions on the label carefully to determine the correct dilution or amount of fluid to
use.
DANGER!
Do NOT use automotive antifreeze to winterize your potable water system as they are highly
toxic and ingestion may leave to serious injury or death
TRUMA COMBI & WATER HEATER BY-PASS VALVE
IMPORTANT! Before winterizing your OP15 you must have a water
heater by-pass kit installed. Running RV winterizing fluid through
your Truma Combi water heater can cause corrosion and Truma
advise against this in their manual therefore you must use the
by-pass kit to winterize your camper.
If your OP15 was manufactured prior to 2022 and does not have
a water heater by-pass kit installed, please contact OPUS HQ
for information on ordering a kit and discuss with your local
RV service department.
Please be advised that your Truma Combi system has a holding tank in it. Please ensure you carefully read
the Truma Combi system manual for steps to drain the water heater tank of this appliance and prepare it
properly for winterization. Always wait for the water heater tank to cool before draining. More information
can also be found online at www.truma.net/about/news/winterizing-your-truma-aquago-or-truma-combi.
SET YOUR WATER HEATER TO BY-PASS MODE AT YOUR TRUMA COMBI:
1.
Open the drain valve by moving the lever 90 degrees
( Figure B)
and drain water from Truma Combi
(2.64 Gal/ 10 L for the complete drain) Note: make sure to keep a bucket underneath the drain valve
2. Turn the drain valve back to the closed position.
3. Turn the 3–way valve (Figure C) handle in a vertical direction ( bypass position - Figure A)
EMPTY YOUR TANKS AND SYSTEM
Drain the water from your potable water system following the steps listed in the section above. (Figure B2)
DO NOT use the water pumps to run your tanks dry.
AT YOUR WATER PUMP:
1.
Remove the water filter
2. Remove the factory-installed cap from the 3-way valve
3. Turn the 3 –way valve handle in a vertical direction ( bypass position)
4. Attach the clear vinyl hose to the 3-way valve & hand tighten
5. Insert the end of the hose into the winterization fluid bottle
6. Using the water pump, run this winterizing fluid through the entire water system including the fau-
cets and shower as well. This will lubricate and protect your water pump and fittings during storage.
Close the outlet and turn the pump off.
DE-WINTERIZING – RETURN TO THE ROAD
To de-winterize your potable water system follow these procedures:
1.
Fill your water tanks with water and flush the water system with freshwater Note: Open all water re-
lease points ( Shower, Sink, etc.). Make sure all the winterization fluid is flushed from the system.
2. Follow the steps above to sanitize your potable water system
3. Turn the 3 –way valve handle of the water pump into a horizontal direction ( Open Position - Figure D)
4. Turn the 3 –way valve handle of the Truma into a horizontal direction ( Open Position)
BY-PASS POSITION
FIGURE A
BY-PASS VALVE
DRAIN VALVE- CLOSED POSITION
FIGURE B
PUMP & 3-WAY VALVE
FIGURE C
WATER FILTER
OPEN POSITION
FIGURE D
DRAIN VALVE- OPEN POSITION
FIGURE B2
