Yesterday I finished covering the two dump valves on my Kodiak Cub KD176RD18. This completes the previous posts detailing sealing, insulating, and venting spaces for winter camping. I expect to be able to camp in 0 deg F weather. Covering the dump valves should allow dumping tanks in freezing weather.
The covers are made from black 5 gallon buckets purchased at a local farm hardware store. The buckets are cut to fit all the odd shapes surrounding the dump valves.
Bucket bottoms are facing out and a close fitting hole is cut in the bottom to go over the dump fitting. Openings for the gate valve extending parts are cut in the side of the buckets. The gate valve handle extends outside the buckets.
A custom fit plastic board fills the open previously top of the bucket. The board is attached with several small screws through the bucket wall into the board. Screwing to the belly cover was judged to be too fragile. A strap is wrapped around the bucket and attached to the frame to secure the bucket in place.
Pictures of the finished project are attached.
Inside, the dump valves and pipes are wrapped in a thick layer of insulating tape. Remaining air space inside is filled with fiberglass bat insulation. All seams and edges are filled with closed cell foam insulation and exterior grade tape. A 1/4 inch hole is drilled into the low point to drain any water that gets in.
Heat flow is planned to come from the liquid in the tanks. The black water tank has a short 3 inch pipe. The gray water tank has a short 1 1/2 inch pipe.
Testing will commence in the fall of this year (2020) and winter of next year (2021).
Dutchman Kodiak Cub KD176RD 2018
Nissan Pathfinder 2015