Start with an opaque food-grade tank, tap or pump, drinking-water hose and breather. Choose enough usable capacity for everyone staying in the vehicle for three days.

• Check tank capacity, tap height and hose length.
• Secure the tank and protect the water from contamination.
• A tank or tap alone is only part of the system.

Connect the sink to a suitable wastewater tank with drain fittings, hose and an exterior vent. A removable tank needs secure restraints and a practical disconnection and emptying arrangement.

• Check tank capacity and all connection sizes.
• Route the exterior vent safely and keep it clear.
• Tank-and-fittings kits are supplied loose for DIY assembly.

Choose a compatible toilet and bracket, or a sliding kit if your layout needs it. The finished toilet must be permanently fixed and usable inside your campervan.

• Match the exact toilet model and base shape to the bracket.
• Check usable clearance in your intended layout.
• Buying a bracket does not by itself guarantee certification.

Choose a sink and secure cabinet or mounting surface, then connect fresh water and drainage. The complete Fix-a-Sink package brings the main water and waste parts together.

• Check cabinet footprint, sink cut-out and access to tanks.
• Cabinet-only and sink-only products need plumbing separately.
• Vehicle mounting, sealant and final installation remain DIY tasks.

Plan secure rubbish storage and ventilation into the whole vehicle. Check the toilet and wastewater ventilation as well as the living-space layout.

• Use secure, fit-for-purpose rubbish storage with a lid.
• Check tank vents, odour control and safe exterior ventilation.
• An open window alone does not show the whole installation complies.