How did we do this?
foam board insulation
Knife / razor blade for cutting the foam
First, you need to take measurements for the sizes you need to cut the foam. We only wanted to enclose the area around the holding tanks.
So, we cut two long pieces......
and two short pieces for the sides. And, a few smaller pieces at the end to fill in the gaps.
|The board is flexible enough to conform to the shape of the tire.|
Tip - when cutting the foam it's easier to cut down the lines already in the foam board.
|Chad cutting the foam board|
|The foam board configuration|
|Cut out the area for the sewer hose door.|
....which is located close by in the refrigerator vent compartment.
We placed the heater in the compartment.
The last step was to secure the corners and any loose sections with duct tape.
We left the heater running in the enclosed space for 5-6 hours. The valves opened easily and the tanks drained with no problems. Success!