Above: Interior hatch, and access to the old stair tunnel is now storage
I cut a hatch through the floor inside the camper to access this area.
A large rear step storage unit was constructed to deal with our wants. A three step set of RV stairs was installed that folds down with minimal effort and provides 24-inches of wide, non-slip footing.
In the largest of the storage cavities, 4-inch ABS piping was installed for grey water storage from the shower. I managed to add about 14 gallons of grey storage, which is plenty for two quick showers. The remaining cavities are for dirty item storage.
Above: 4″ ABS pipes for grey storage for the shower
Above: Under side is closed in, but removable with vents
The unit is made of exterior spruce plywood. All construction assembly was made with fasteners and waterproof adhesives.
Before any paint was applied, the entire unit was coated with two coats of thickened fiberglass resin, hopefully to stabilize the wood work before the final finish of a few coats of marine enamel.
Above: Driver’s side dump and sewer pipe storage
The entire unit was bolted to framing under the camper, sealed with caulk, and non-slip tape was applied to horizontal surfaces.
Above: Final dump gate valve on driver’s side
Previously, the camper had a rear facing dump outlet. It now dumps from the side with a gate valve I installed. It’s accessed through one of the small rear storage compartments.