Identify the toilet you’re installing before measuring or buying parts. The standard Nature’s Head, Weekender, and urine-diverting toilet have different dimensions and service requirements.
Measure fit and plan ventilation
- Check space for the lid and handle and for removing the liquids container or servicing the solids bin. Confirm the mounting dimensions on the exact model drawing.
- Plan a vent path to the outside and a location suitable for the exterior fitting. Compare our Nature’s Head mushroom ventilator and shell vent kit with the installation requirements.
- Confirm the fan’s power requirements and whether the installation uses the specified DC supply or an approved AC adapter. Before making vent, mounting, or drain openings, review the manual for the exact toilet.
Keep the toilet serviceable
Use the approved medium and cleaning methods for your model. Keep the vent and fan clear, and have space to remove and clean the containers. See our composting toilet care guide or browse parts and accessories.
Request the correct manual
Ask Prepper Hideout with the model, the installation setting, and a photo of the label if available. Use the current dimensions and instructions for that model before drilling, routing a drain, or choosing electrical parts.
Shell vent planning for insulated and thin walls
The NH-ShellVent assembly is the screened outside vent. The ShellVent-Kit also includes a 12-inch length of nominal 1¼-inch PVC and an interior trim ring. If you already have the wall pipe and finish trim, compare the assembly by itself.
- Choose an exterior wall location with room for the vent hood, the hose, and removal of the hood for cleaning. Measure the wall and check for framing, wiring, and plumbing before cutting. The manufacturer calls for a 1¾-inch opening for this wall vent.
- For a framed or insulated wall, measure the penetration depth and use a piece of nominal 1¼-inch PVC long enough to connect the outside vent to the inside hose. The pipe comes with the installation kit and is separate when you buy the assembly alone.
- For a thin, uninsulated wall, use the interior flange supplied with the toilet. Align it with the outside vent and attach the hose to the flange. At the toilet, the hose connects to the fan housing.
- Fasten the vent base to the exterior and reinstall the hood. Use a weather-sealing method suitable for the wall or vehicle. Check that the hose stays clear and that air exits outdoors. If the wall assembly, vehicle application, or fitting differs, ask Prepper Hideout for the exact installation guide before drilling.